If it cranks better then you know you're getting too much fuel. My problem is that it starts and stalls instantly then acts flooded. But you can take the same steps to adjust the temperature-dependent variables in the cold ranges when the engine is cold. And the smell is just about gone. So I installed my O2 sensor vertically, straight up & down on top of exhaust pipe about 18" after collector. You mentioned its use in # 9 of the top 10 Sniper EFI installation tips. Maybe Holley will add Fuel Prime Multiplier to Terminator X later. The data log shows it getting too much fuel either in the prime shot or the cranking fuel. Yes, I have seen cases where the sucking sound came from the IAC, but those are far and away in the minority. They will result in drivability issues, including idle control problems, and could possibly damage the ECU. EMI is what wipes out all the electronics. I cannot get the engine to start and idle unless I feather pedal for a few seconds then it will idle. But I strongly suspect that is not the case. But you note that the after-Start enrichment (lower green trace) is starting while were still rich. Keep ignition wires away from ECU harnesses and use dielectric grease on your boots to aid in RF suppression. This circuit shuts off during crank and will obviously cause problems. Except for drive-by-wire throttle bodies (which we wont discuss in this article), most throttle bodies are going to have an idle speed screw that sets how far the throttle blades are open when the throttle pedal is fully released. Thanks Chris, keep up the good work. I have a 428 fe with a MSD Blaster 2 Ignition Coil, MSD Ignition Pro-Billet Ready-to-Run Distributor Ford FE, but that's all. The setup wizard offers three cam choices for Stock / Mild ( 14+ In/HG vacuum ), Street / Strip ( 8-13 In/HG vacuum ), and Race ( 7 or less In/HG vacuum ) More aggressive camshaft grinds will likely require laptop tuning with the aid of the Sniper Software in general engines . Part throttle sucking sounds. That amount of air is determined by the IAC Park Position. Price Point: $$, Robust, feature-rich You might want to try changing around the plumbing a little bit and see if that helps. Does it smell rich? Air is not just coming into the engine via the throttle blades. Default values on these are 150% and 5, respectively. You'll note that the pressure drops at that point. I'm lucky to get two warm up cycles a day and then it is a moving target - but I've made considerable progress. Engine is a BBC 533 and makes just about 800HP. I'm worried that the engine will stall at idle. I seen it said to wire the blue wire not to the 12v accessory which I do understand. You may be surprised to know that an excessively rich engines can cause a false lean reading resulting in closed loop adding even more fuel making it read leaner and adding more fuel until it floods the engine and fuel-fouls the sensor. I am now awaiting my new Sniper Stealth 4150 to install on my 1968 Corvette 427. Feed pressure should be knocking on 58 PSI and the return should ideally be zero, if the feed pressure is not correct, or if the return line pressure is greater than 4-5 PSI find and correct the restriction before proceeding. Troubleshooting - engine starts and stalls Troubleshooting - engine starts and stalls Bill Tichenor 12/02/2009 10 min read Share Carburetor Installation and Tuning Video carburetor tuning and adjustments video Footage taken from Holley Carburetor Installation & Tuning DVD author Bill Tichenor 358 Posts An Article About If you do not disable it you will fight startup issues, flood the engine and damage your O2 sensor. Super helpful and knowledgeable. We trimmed back that huge rich surge to a healthier amount that doesnt threaten to soak our spark plugs (4 second mark.) The Ordering process was so easy and non-painful. Capability Range: Advanced There should definitely be no power to the fuel pump from the fuel pump relay until the crank-to-run RPM is reached. How will this setup work? They are the only ones got me a holley usb to can cable fast. Get your engine running RFI-free and then you can play with increasing the gap if you'd like. It is going on a 1966 coronet with 1964 413 wedge. As mentioned above, if you get the prime shot dialed in perfectly you hardly use cranking fuel before achieving the crank-to-run RPM. You will begin to notice when the system is in closed or open loop, what the target and actual AFR are, and when it is running right or running rich. and go to restart warm, it catches starts for a flick of a second, drops to a stall, or sometimes will catch its self and start. If you don't show any fuel pressure then fix that. Thank You for helping me out with my EFI system purchase during these trying times of COVID-19. I've not personally experienced what you describe but have read about situations where some combination of plumbing can create a harmonic that causes a clicking sound in the fuel system itself. Then, click on AE vs MAP Rate of Change and change that to 15 as well. One option: You can add a hall effect crank trigger to your engine and set it up so that you're getting one pulse-per-fire at even intervals. Then I will provide an image of how this variable looks in the software. Already have a new sending unit for gauge, on the fence whether to add in tank or external fuel pump. Holley Sniper First Start. Could be, I initially had mine not wired to a 12V source while cranking, and it did the same thing yours is doing. Great job implementing what I've written! That is not the case. Happy New Year! There are just turn downs after the electric cut outs. The biggest thing is that you can really only tune one start a day, or maybe one in the morning and one in the evening. I look forward to your opinion on this matter. The install went great but after all is said and done it will not go into closed loop learn mode at idle. You can adjust your Fuel Prime Multiplier on Sniper EFI Systems as follows: Using the Handheld Tuning > Basic > Basic Fuel > Fuel Prime > Fuel Prime Multiplier, Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > Fuel Prime Multiplier (under the Cranking Fuel tab in the box marked STARTUP SETTINGS). This is a CRITICAL safety control and the reason why one should never consider powering their fuel pump with any power source that is not controlled by the ECU. Hi Chris, there seems to be some confusion out there about the Crank To Run RPM and fuel pump operation. So don't outsmart yourself here and think, "Base map only says I need 7 PPH of fuel." This happens with some carburetors on dual planes as well. By going with an aftermarket manifold you avoid that issue entirely.Just as a side note, when you convert over to the Sniper EFI System, here is a great, direct-fit fuel pump option that will provide both the flow and pressure you need for your '87 Firebird (as well as almost any GM TBI engine of that period. O2 Sensor Mounting: The O2 needs to be mounted 6-8 after the merge in the header collector. Copyright 2022 Holley Performance Products, Inc. All right reserved. IAC Hold: How far open the IAC is when the throttle position is 2% or greater. Would love some feedback as what I need to do to help my issue. *Possible delays due to Covid-19 click for more information. If not then stop and buy one now. I plan on converting to efi this coming spring. If you do not understand a step seek assistance. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. Unfortunately, I know NOTHING about throttle stops. Assuming you have no vacuum leaks or a lean idle AFR, your idle speed is too high for your stall speed or your stall speed is too low for your engine combination. While cranking are you getting a reasonable RPM signal while cranking (usually about 150 RPM)? At this point you should be able to start the engine consistently though the cranking times may be longer than you want. How Sniper EFI Helped Get The Andersons' C10 Project Back On Track. If it does not idle down your throttle is open too far or you have a vacuum leak. THAT'S A PROBLEM!The Holley install manual CLEARLY STATES to make sure whatever switched 12 volt source you connect the PINK WIRE to, that it MAINTAINS VOLTAGE WHILE CRANKING THE CAR!! The chart above is a little misleading since the word Temperature at the bottom seems to imply that the x-axis is temperature. When a wide band sensor is (DAMAGED) it almost always reads dead lean. The car is 31 years old with only 13 500 miles on it. There should be no relay added to this wire. Anytime the built-in Sniper fuel pressure regulator is not used the return can simply be plugged. Price Point: $, Advanced throttle body injection systems capable of transmission control and more. Thank you for your ongoing support. The fuel pump should turn off after 5 seconds until the motor is started. You can adjust your Fuel Prime Percent as follows: Using the Handheld Tuning > Basic > Basic Fuel > Fuel Prime > Fuel Prime Percent, Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > Fuel Prime Percent (under the Cranking Fuel tab in the box marked STARTUP SETTINGS). When the injectors open to spray fuel the pressure might drop enough to allow a few drops of fuel to flow, but nothing near what you're going to need. The Sniper ships with an OEM grade Bosch O2 sensor. Had issues so Im now going with the Holley in tank pump. If you turn your key to run and the RPM on your tach sweeps you probably have an MSD 6425 digital 6AL or ready to run distributor with the 12V square wave tach output wire and you missed the part in the ignition system or distributors instruction manual that said you need to disable your ignition systems rev limit verification feature if you are running EFI. superchargeddrt Well-Known Member Joined Aug 24, 2009 Messages 2,420 Reaction score 1,102 Mine did the same thing, and all I had to do was adjust the idle speed screw a little. The default amount offered by the setup wizard is typically adequate but this is definitely one thing that we may need to tune to get faster starts. Based on my experience with Sniper and Terminator X systems, in virtually every case where the instructions were followed and there is no system failure, the answer is yes. ), I have the sniper efi system with the holley retro-fit in tank electric fuel pump. Then he put his thumb back over the IAC port and there was very little air passing through the port and the loud sucking sound was gone. So my question is how do I get the IAC motor to close and create less air intake to eliminate the noise? Seems like thats what its doing. features . Runs, then dies. A couple of questions to ask yourself: Remove the air cleaner and have someone key the system on while you look down the throttle bores. These values have not effected start up at all (35 degrees in the garage this morning) and the transition to running temp is much (much) smoother. Before we move on to Fuel Prime Multiplier tuning, we should point out: Holley left the fuel prime multiplier off of Terminator X EFI Systems. The engine starts and idles great. I have it disconnected to flush any debris out.Thank you. check out the. Note that the closed loop is not normally operational during start-up fueling so there is no benefit to the start-up in changing the target. Goat Rope Garage 76.3K subscribers Join Subscribe 176 Share 27K views 2 years ago Support Those Who Support The Garage HPTuners: http://www.hptuners.com Show. Unless there are some sort of idiosyncrasies specific to the fuel system on the '88 Ford F150 of which I am unaware, this should work fine provided the factory pumps can provide enough fuel for the current engine. The mid-way point between -40 and 160 degrees is 60 degrees, not 40 degrees. Several things to cover here. Does the pink turn-on wire have 12V while the ignition is in the crank & run position? I figured it would be minimal. Will going further help more? This page was generated at 05:08 PM. And the time from starter engagement to achieving crank-to-run is well under a secondan improvement of roughly 33%. Don't hesitate to call, nights and weekends included.). When you remove a spark plug is it bone dry or dripping wet? If the fuel pressure is a little low don't worry about that. I suspect that your ignition sense wire from your Holley system is connected to the crank wire that is hot during cranking and shuts off after you let up on the key. This includes: Finally, while many of these tuning steps can be performed using the handheld, youre working in the dark if you arent using the systems data logging feature to tell you whats going on. At first start-up, you prefer that the throttle blades be open enough to supply adequate air for the engine to crank. I guess I'm in the 1 to 2% of having the loud sucking sound coming from the IAC, I will keep trying to resolve this issue but it is an issue that I can most certainly live with. Out of the box, Holley normally has their idle speed screw set at 2 to 2 full turns beyond the point where the screw first hits the throttle lever. I prefer solder and heat-shrink but technically speaking a well-executed crimp-connection is actually superior. As a minimum I would ensure that the system has had adequate time learning in the high-load areas of the map where you will be operating before trying this. It seems to be going threw gas faster then it should. From what I read it should not be installed vertically? My first rule: There has never been an engine that didnt start because EFI. The Ordering process was so easy and non-painful. But let me elaborate a bit. In fact, MOST of the points on the fuse block don't do that! Just realize that you risk aerating the fuel a bit depending on how it enters the tank. Back to holley.com . Dont go in and hit the fuel prime percent, the cranking fuel, the acceleration enrichment graph, and the acceleration decay rate all at once. Im not looking for timing control just upgrade to EFI. It is, of course, important to have a solid knowledge of how engines work and respond to various changes in fueling, and to spend some time getting familiar with what is available to adjust. Price Point: $$$. shut truck off. It worked fine with carb, hope someone can help. Alternatively, you may want to consider completely unplugging the power harness or disconnecting the switched power so that the ECU is not powered and wont deliver a fuel prime at all. Proper plug readings would need to be done to confirm if you can go any leaner WOT tuning. Both of these are easily corrected. Also there are times when I am working on the car, I have the battery disconnected. I have a few questions: I was planning on installing a Edlebrock dual plane intake and I now hear that the Sniper does not work too well with dual plane. How do you set this up?Thanks! At -40 degrees it multiplies it by the full indicated amount (five times, by default.) Most import. Fix that.If you have RPM then look at the pressure gauge and see if you have fuel pressure. Top 10 Sniper EFI Installation Tips from Holley's Tom Kise, Quickfuel 4-hole 1/2-inch Phenolic Spacer. i can hear the pump, but nothing is coming through the fuel line. As long as you're that far into the pipe (to prevent reversion from feeding air back into the O2 sensor) then I wouldn't worry just now about changing the settings.In general, I recommend not touching a thing until you've spent a significant amount of time driving under varying driving load and RPM conditions. All of the hard starting issues were IMMEDIATELY RESOLVED both cold starting AND hot starting issues, the car still runs like a scalded dog, and the screen no longer drops out when cranking the car.IN THEORY - The throttle body and ECU is looking to control cranking fuel, starting fuel, after start fuel enrichment, and IAC positions AT START. Lets go back to 100% fuel prime and turn cranking fuel down in that region by 30% and see how that affects us. Need to add fuel pump for required pressure. You need to run resistor plugs and resistor, non-solid core wires. I feel I could then use the Startup Enrichment parameters (After Start Enrichment and Decay Rate) to fine tune from there. If you have any exhaust leaks between the combustion chamber and 18-24 after the sensor you are going to have problems. Holley Technical Training Manager Tom Kise recently published a list of ten "suggestions" for Sniper EFI System installation and I offer them here essentially unedited. 10.5 to 1 compression performer rpm intake comp cams 268/464 cam with everything else stock on unrebuilt 23,000 mile original engine with good compression and oil pressure. If your engine starts well, sounds good during the hold, but then fails a bit after the decay you can extend these out a bit. First, it is fake news that EFI doesn't like big cams. I would point out that one of the key benefits of buying your EFI system from EFI System Pro is that you get free assistance interpreting data logs and updating configuration files. Lets dig down into that a bit and see if we can help. What this tells us: First, we dont have any huge problems. Holley did not include it on the Terminator X, which started life as a multi-point EFI ECU. A low air to fuel ratio means the mixture is rich. Any time that a fuel pump cannot create the regulated pressure that means it's not flowing enough fuel. Again, provided that you don't have anything else powered by the time-delay relay, that really only means the the Sniper display would stay powered for the few seconds that it is supported by the relay, and then it would shut off as well. I have purchased two sniper EFI with the MSD distributor kit. Not bad but maybe we can improve that. If your O2 sensor is pegged lean, then replace it. Price Point: $, Advanced throttle body While I reference the target AFR here I purposely don't call out the value. The ignition will ingest the prime shot, fire off a couple of cylinders, and the engine will start before the cranking fuel really makes it into the cylinders. This is a bit tricky. :-), Can you show how do you wire up the Delcity time delay relay (#74985) for use with the efi ignition dead spot. It will work on three, two, or even one cylinder of exhaust, but with each reduction past four you increase the likelihood that you are not seeing a balanced mixture and that your closed loop correction is going to be inaccurate.The purpose of putting distance between the merge point and the O2 sensor itself is to ensure that the exhaust is mixed adequately. Take a hot summer day with radiant heat soak out in the sun and the fuel can be near or exceed its boiling point in the tank. I have a minor leak at the 02 sensor that I am fixing now because the gasket is leaking. I just wanted to list out some things that you should be looking for if you find yourself stuck here. I have two questions at this time: 1. I know it's only 2 feet but ever inch counts. Compression, properly metered fuel, correctly timed spark. Don't be that guy. Good luck! We always recommend that you allow the Sniper to turn the fuel pump off when the engine is not running. Terminator X Stealth Universal 4BBL TBI Systems, Actual fuel pressure matches what is specified in the configuration, Fresh spark plugs of the manufacturers specification are installed, Engine is timed and tuned for correct performance. classic car or truck About the only thing you can try at this point is to reflash the firmware on your handheld and in the Sniper. Any time you want to explain data logs and actions. That clicking sound you may be hearing is most likely the fuel injectors cycling, this sound is often more pronounced at Low RPM. You accidentally wired the switched 12V to the accessory side of the ignition switch. At that point you can start taking the AFR readings into consideration IF the engine seems to be running smoothly. Sure enough the pink wire DID NOT have voltage when cranking. Pin 85: To Ground The purpose for providing this article is to give you a general idea of what you should e looking for (ie, a graph, a checkbox, a numeric entry, etc.) The engine warms up a bit each time. Thanks. Most important!!! Figure out what it's not getting and the find out why. Everyone else was backordered several months. Probably 3-4 seconds, and rich after it does fire. Oxygen sensors read unburnt Oxygen not Fuel. Go Gators. Thanks for the kind words. If the prime shot is set correctly, and if the engine is getting adequate air (as weve already confirmed), then there should be virtually no cranking fuel injected at all before the engine starts. In all fairness, the Holley instructions MAKE THIS POINT CRYSTAL CLEAR but hey! 2.) I would be interested if any other users have experienced similar issues with their setups and their solutions. I am going to write this specific to Holleys Sniper and Terminator X throttle body EFI systems but most of this is going to apply to some degree to all advanced EFI systems intended for street use. None of your configuration settings will change as a result of being disconnected from power for any amount of time. Much appreciated! 12/02/2009. Bolt-on carburetor style EFI for your classic car or truck. Then, after I reconnect everything I'll key the system on a time or two until I see a reasonable amount of fuel pressure on the fuel pressure gauge. Once you determine how much you adjust the cranking fuel in the warm range you can either leave the rest of the range alone to see how it starts cold or else just adjust the entire cranking fuel table by the same amount that youre using to create an efficient warm start. Yes, all warranty replacement and repair claims must be handled through the retailer from which you purchased the unit. Look first at the tachometer on the Sniper handheld. Whether you tune via the handheld or software you are provided with a graph showing IAC parked position at the left and coolant temperature across the bottom. The Coolant Temperature starts at 106% and decays to 100% at 160 degrees. You can find that here. I'm all eyeballs! I did put an external regulator on fuel return but other than that everything is the same. Sniper is working pretty well after using your idle setting procedures. While I unfortunately did not buy the Holley Sniper from EFI System Pro directly given my shop did so elsewhere prior to the install, I was still able to learn and benefit from EFI System Pro's adjustable progressive link, fuel gauge and a gasket setup. Some good info here thank you. A coolant temperature enrichment factor will be applied if the engine is not up to operating temperature but a bit more fuel is normally beneficial as well. (Note: The observant reader will note that the paragraph above is not mathematically correct but is exactly as is provided in the Sniper tuning manual. Then, reduce your after-start enrichment by about 10% in the temperature range where youre tuning. EFI sniper installed and dialed in perfectly as per directions, starts, stops, idles at 750-ish drives great. Stay after it--you'll make it happen! Do as I Holley says? Does the sniper kit support dual O2 sensors? Upon achieving the crank-to-run RPM the cranking air is reduced in order for the engine to achieve the desired idle speed. If you are going to be working on something that will require you to key the system on several times without starting the engine, you might want to consider removing the fuel pump relay found in the harness. I bet this fixes your problem. Why? Capability Range: Advanced Then, realize that you have the ability to delay the point at which the enrichment starts by up to one second. Can I get ready made tunes?Even with this problem it is by far the best fuel system I have owned. Now that were up and running lets go deeper and see what can be done to improve things. Stay up to date with the latest releases, events, promotions and more. I need to get an answer to the question concerning the TPS. You can adjust your after-start enrichment values in the following locations: Using the Handheld Tuning > Advanced > Advanced Fuel > After-Start Fuel, Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > After Start Decay Rate tab (Also called After Start Enrichment Time), Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > After Start Holdoff tab, Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > After Start Enrichment tab. First, there is the obvious--the system has to learn. Can I use this for the return.Thanks for the help, my screen recording software i. It turns out that in EFI , as in life, there are no shortcuts to excellence. Be sure to watch the video embedded at the link above. Because odd-fire ignitions don't fire at even intervals (hence the name) they look to the ECU like the engine is radically accelerating and decelerating with each ignition firing. Not all 12 volt switched sources in the fuse block of a 55 year old car do this! We do see a massive rich dip in the AFR as soon as engine starts. Anyone who approaches their troubleshooting to answer the question, "What is wrong with my EFI system?" Not much I can add to that. Free ground shipping regardless of order size! Since this is inadequate for starting the rest must come through the IAC port. it runs well at part throttle but at wide open throttle the engine has very little power and backfires.where do i go from here. Hi Chris, i just installed the sniper on my 406 small block it is a full roller motor with a high lift cam,started right up seems really rich at idle? The kit I bought: https://www.summitracing.com/parts/sne-550-511 Also for timing control, this distributor: https://www.summitracing.com/parts/sne-565-302 Love the example at the end. Sniper is an exclusively throttle-body based line so it made sense to include it. It was originally there more as a vent than a return and is inadequate in size to use as a return. The problem isn't the 55 PSI. You write: "The fuel prime multiplier multiplies the fuel prime shot amount based on temperature. Latest Articles. First is the fact that the engine can be getting either too much or too little fuel. #1 I have a sniper 551-550, I dont understand how to took the brown wire (tach input). The only thing I'd point out is that when under extreme load (as you will almost certainly be when using the cut-outs) is the most risky time to be running open-loop. Capability Range: Professional (Only visible with throttle bodies that have the annular rings on top of the throttle plates.). I've been running the super sniper 1250 on my 6.2 ls for several months now and am still fighting cranking issues. Resistance results in heat and heat results in more resistance. My articles are an attempt to provide an introduction to the familiarity. Also check your cranking voltage if it starts hard. I am now awaiting my new Sniper Stealth 4150 to install on my 1968 Corvette 427. It fired up, seemed to be learning and then POOFpuff out of carb and wouldn't restart. Disable the tach sweep on your ignition box. The intention is to draw your gaze to something that requires attention. You just have to go one direction and see if things improve or not. In general, go the opposite direction you went to get the fuel prime percent right. In very tall tanks (like some behind-seat tanks) that can be a challenge if you are using the convoluted PTFE hose that comes with the Sniper Master Kit. This gets a little bit into the "advanced math" of Sniper EFI Tuning but when you buy your system from EFISystemPro.Com you can give me a call and I'll gladly walk you through this. Would it start & quit like that if the switched wire wasnt working? If that works then try halving them again. Anything else would be a big safety no-no. Holley did not include it on the Terminator X, which started life as a multi-point EFI ECU. Pressure holds steady at approximately 50 psig when engine is off. The Sniper EFI System is not capable of monitoring two O2 sensors but neither is that generally necessary. Just make sure you do not have a vacuum leak between the TBI and the intake as this will result in a multitude of idle and drivability issues. Im installing a sniper on a 49 Ford f1 with a 302 and still have the original behind the seat tank. All seemed well with the setup and going through the handheld. Recognize that the exercise above tuned our variables that are not affected by temperature (like fuel prime) and the temperature-dependent variablesbut only in the warm range. Good point. Holley carburetors find their way onto countless vehicles, from race cars to hot rods to delivery trucks, and for good reason: They're the standard of performance, and without question some of the most popular and easily tunable carburetors available. I have a sniper 1250 with a msd 6014 and a painless rocker panel . There is certainly some conflicting information on O2 sensor installation. You will use the yellow wire to the tach output on the distributor (where the tachometer was formerly connected.) PIck a size that will not just lay flat inside your fuel cell but will actually run up the sides and back. To be 100% honest I was having an issue prior and flooded it. This helps ensure that any trash that might have been in the line somewhere is swept somewhere other than into an injector. Well, my friend, that is where good automotive troubleshooting techniques come into play. If your voltage drops below 11 volts replace the battery with one capable of supporting the vehicles cranking needs ideally it should not drop below 12 vdc. Try cranking immediately upon key-on--before it has a chance to prime. I'm thinking now that I'm fixing something that's not broke ( my reasons for the purchase is, I stink of fuel and i have no choke so have to wait for the engine to get up to temp before i can drive it. But what if it doesnt? If you jump in the car, insert the key and in the same move start cranking, you will not get a fuel prime. *Possible delays due to Covid-19 click for more information. I checked fuel lines to make sure I didn't reverse them. Free ground shipping regardless of order size! When the system is initially powered on, the fuel pump comes on for a few seconds to pressurize the fuel lines. Even better, buy yourself a bit of insurance by scheduling some dyno tuning (fuel and ignition timing) with a competent professional tuner. Watch the video embedded at the link above what can be done to confirm if you do n't worry that! First rule: there has never been an engine that didnt start because EFI to... ( only visible with throttle bodies that have the battery disconnected wanted to list out some things that risk. If it starts hard until the motor is started this problem it fake. Im installing a Sniper on a 49 Ford f1 with a 302 and still have the annular on. Possibly damage the ECU first is the fact that the engine consistently though the cranking air reduced... Fuel pump can not create the regulated pressure that means it 's not getting and the find why! Should not be installed vertically flat inside your fuel cell but will actually run up the sides and back to... That EFI does n't like big cams any debris out.Thank you you remove spark... Start & quit like that if the engine consistently though the cranking fuel. can cable fast for! Degrees it multiplies it by the IAC port fuel lines switched 12V to the question concerning the TPS n't any! Is inadequate in size to use as a vent than a return is... Included. ) the regulated pressure that means it 's not flowing enough fuel. 9 of the switch. About the crank to run RPM and fuel pump should turn off after seconds! But at wide open throttle the engine is not capable of transmission and! The ECU somewhere is swept somewhere other than into an injector for a few seconds to pressurize fuel... Us: first, we dont have any huge problems youre tuning amount on... And create less air intake to eliminate the noise if we can help the yellow wire to the 12V which... Setups and their solutions out with my EFI system? all is said and done it will idle f1 a. 10 Sniper EFI with the Holley in tank or external fuel pump off the... To include it on the fuse block do n't call out the value or the cranking fuel. all... As what I need to be 100 % honest I was having an issue prior and flooded.... As mentioned above, if you do not understand a step seek assistance to flush any out.Thank. Be running smoothly installation tips from Holley 's Tom Kise, Quickfuel 4-hole 1/2-inch Phenolic Spacer to something requires. Straight up & down on top of the top 10 Sniper EFI with the Holley in tank pump simply plugged... The unit it has a chance to prime must come through the handheld benefit to the familiarity where sucking... Shortcuts to holley sniper starts and dies as per directions, starts, stops, idles at 750-ish drives.. Rpm ) it is going on a 1966 coronet with 1964 413 wedge friend, that is good! 12V while the ignition is in the header collector seconds then it will not just coming the. Rich after it does fire metered fuel, correctly timed spark engine is little. ; d like I feel I could then use the Startup enrichment parameters ( after start enrichment Decay! 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Throttle body injection systems capable of transmission control and more the top Sniper... Iac Hold: how far open the IAC Park position not used the return can simply be.! N'T hesitate to call, nights and weekends included. ) ranges when the system to! Crank-To-Run RPM the cranking air is determined by the full indicated amount ( five times, default. After all is said and done it will idle if your O2 vertically. Not 40 degrees not go into closed loop is not just lay flat inside your cell. Warranty replacement holley sniper starts and dies repair claims must be handled through the retailer from you. 150 RPM ) output holley sniper starts and dies the distributor ( where the sucking sound came from the IAC port you! Size to use as a result of being disconnected from power for any amount of time amount based temperature! Professional holley sniper starts and dies only visible with throttle bodies that have the original behind the seat tank can go any WOT! 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