He then put his thumb over the port, it was sucking air pretty good like mine does, and the engine stalled. Capability Range: Advanced FAIL!! Last time it ran was last week and it ran fine but I believe I ran out of gas or was close to running out of gas while idling in my driveway. Quick to respond and very knowledgeable. Any time that a fuel pump cannot create the regulated pressure that means it's not flowing enough fuel. While I reference the target AFR here I purposely don't call out the value. And the less correction you do until you understand that---the better! My problem is that it starts and stalls instantly then acts flooded. 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. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. From there it is a slam dunk. Thanks, Steve! I am guessing you have some sort of current loop going on. Had issues so Im now going with the Holley in tank pump. It just can't work properly.But there are options for making it work provided you source your RPM from something other than the ignition. Full product line and accessories at excellent pricing. Therefore what remote TPS can be used? While cranking are you getting a reasonable RPM signal while cranking (usually about 150 RPM)? But you note that the after-Start enrichment (lower green trace) is starting while were still rich. 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. Will going further help more? Apr 2, 2020 First off thanks to everyone who has been helping me get this thing running. I would add a 12v-switched relay to power your Sniper. Can I lower it for this purpose? Not much I can add to that. I did not, but as I was checking flow at regulator side, it was a large steady flow of fuel coming from regulator. So don't outsmart yourself here and think, "Base map only says I need 7 PPH of fuel." Thanks. Find a lower price anywhere and we'll beat it by 5%! 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. So I can't tell you what TPS to use. I've read that you can data log, my question is are there any professionals that can analyze the log and actually help write one for you that will help with the fine tuning. It turns out that in EFI , as in life, there are no shortcuts to excellence. Is a tremendous volume of fuel sprayed into just one barrel? Proper plug readings would need to be done to confirm if you can go any leaner WOT tuning. If you're getting in the 10's your asking for issues. That's where I would start. I created logs in the past but never knew what I should be seeing and how to make the specific tweaks. What we're primarily doing in this example is ensuring that we're tuning our start-up AFRs inside the range of common start-up AFRs. Make sure the fuel pump is properly mounted and picking up fuel. Can you post a photo of the wiring on the ignition switch? I discuss idle setting procedures at some lenth here and you'll note that I never mention sound. But you can extend the leads using wires of an equal or heavier gauge. Continues rich and then goes a bit lean. Is there enough cable to get to the battery? New or not i have send dead item right off the shelf. Good luck! also i returned from test drive exhaust seemed clean at idle at first then seemed to go rich, any help would be greatly appreciated.Also, I have long tube hooker super comp headers the only place i could mount the sensor is 10" past the end of the collector , one of the post said i could go into tune up program and change the poramater from 3 to 1 is the correct? Provided that your ignition is not also being powered by the time delay relay, the engine would shut off as soon as you switch off power, at which point the Sniper would immediately switch off the fuel pump.The Sniper EFI System, however, would not shut off until the delay timed out. If you block off the IAC port and adjust the throttle open or closed as required and you cannot achieve a desirable and stable idle speed, your issue is not with the idle air control settings. The only issue that I have with this unit is the loud suction sound coming from the IAC port. But few have a crimper that is capable of executing a truly excellent crimp. I checked fuel lines to make sure I didn't reverse them. I see folks debating this so let me say unequivocally that the Sniper WILL NOT WORK on an engine if the Sniper is trying to get its RPM signal from the ignition. Once you've done that then you can see if you don't benefit from going a bit higher or lower. Does it matter if O2 sensor goes in drivers side with true duals?Thanks for spending your time helping us weekend mechanics. 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. transmission control and more. I saw a video about this issue and he was able to resolve this issue by adjusting the manual set screw on the unit. Any help with this would be greatly appreciated.Gary. IMPORTANT NOTE: After each variable referenced in the article below I will mention the way to access those variables using the handheld controller and the software. That means at or above 55 PSI it is capable of flowing ZERO fuel. I have just finished installing my Holley Sniper to my 67 Camaro. So try cutting both of those numbers in half and see what happens. My situation, although related to start up, is somewhat different. O2 sensor readings are meaningless until the engine has crossed the crank-to-run RPM threshold (400 RPM by default.) Go Gators. Use all of the tools at your disposal including (or maybe especially) your ears, eyes, and nose. If the engine starts but is extremely rough-running were still in the guessing stage because misfires are going to cause the AFR to read lean. May 23, 2022. And the time from starter engagement to achieving crank-to-run is well under a secondan improvement of roughly 33%. That added fuel is called after-start enrichment. Hard starting cool but starts easy when hot. Much appreciated! While it is usually possible to install the Sniper EFI System on an aftermarket intake with the Quadrajet footprint, very often the factory Quadrajet intakes will require an adapter for the Sniper throttle body to seal properly. Sniper Owners: Once youve tuned your fuel prime on warm starts you can look forward to judging the efficacy of your fuel prime setting on your next cold engine start. You can feather it a bit so that it generally keeps the same shape but don't impact the cranking fuel up in your warm temp region. Then is the actual amount of enrichment, which is set in the After-Start Enrichment table. Pin 30: To Battery In general, go the opposite direction you went to get the fuel prime percent right. The images are NOT intended to provide you with the values you should be using in your configuration. While I have different insights on a few of the finer points this is all great information that can only get you closer to an ideal solution. Remove paint, powder coat or anything else that is not bare metal at the connection point. We see a nice improvement in that big fuel dump as the engine starts running (between 3 and 4 second mark.) Instead, what most folks find is that the sucking/slurping sound that comes in a very few of the Sniper installations can be solved completely by installing a spacer gasket between the Sniper throttle body and the intake manifold. Love the example at the end. 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. The amount of air allowed in is configured via the IAC Park Position and is temperature dependent. This first data log shows a startup using the default settings on a Terminator X Stealth. Dont go in and hit the fuel prime percent, the cranking fuel, the acceleration enrichment graph, and the acceleration decay rate all at once. The fuel pump should turn off after 5 seconds until the motor is started. So go forward with your install confident with the knowledge that if you need help, EFI System Pro can provide it. If it dies again after this it must be a bad coil. 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. 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. Can I run the pink ignition wire to the coil positive? Compression, properly metered fuel, correctly timed spark. Any suggestions ? I was wondering if you could help out? Sometimes it would catch itself, other times it would stumble and run out of breath. If, after setting the fuel prime percent above your warm start is perfect but your cold start is suffering you can tweak the multiplier up or down and see if that helps. Yes, I have fuel pressure. This is called the fuel prime shot. Certainly that seems like a good idea, though I've not seen Holley recommend it in any of their documentation and have never experienced a case where I felt the initial start-up was delayed because it was not bled. 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. There must be an option that has been found to work. Once engine is warmed up been driving for awhile. Changed the fused location of the wire to the ignition, instead of the radio. You can run resistor or non resistor plugs with the 6AL box. You have answered all of my emails, given great technical advice, and have also given the best product support Ive ever had. 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. That's not the case here is it? The x-axis is time, but it is true that the volume of both after-start and coolant enrichment is determined based on temperature (and certainly that temperature will increase as the engine runs, eventually eliminating any coolant modifier/enrichment.) But, even then, I would expect that the fuel management system will get fuel to and from the Sniper just fine. I am in the middle of plumbing my new sniper throttle body system. I still have the lound sucking air sound. Unfortunately, the only way to do this is with the Sniper Software. In general, if the lobe separation angle (LSA) is below about 108 degrees you might need to disable the self-tuning until the engine achieves a bit of RPM and manually tune the fuel map below that RPM. Have a look at those. Now this wire may or may not be run thru a dropping resistor (Ballast Resistor) on the firewall, so you're going to have to find the INPUT VOLTAGE SIDE of the ballast resistor.Imagine my surprise when I dug into this problem further and discovered that this was my issue! There is very little downside to having IAC Park Position be too big. Stay up to date with the latest releases, events, promotions and more. Capability Range: Moderate After pulling the trigger on the Holley sniper I'm now getting worried about fitting it, I've read that the EFI doesn't like a big cam because of the overlap and its possible i will lose the lumpy idle. The prime shot will still fire but since the fuel pump doesnt prime first it will deliver progressively less fuel each time. 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I need 7 PPH of fuel. getting in the past but never knew I! Is working great! my question now is where can I run the ignition! Terminator X Stealth able to resolve this issue by adjusting the manual set screw on the unit the fused of... Times it would catch itself, other times it would stumble and run out of.... Do until you understand that -- -the better given the best product support Ive ever had,. Saw a video about this issue by adjusting the manual set screw on the unit proper plug would. The latest releases, events, promotions and more map Rate of Change Change... Anywhere and we 'll beat it by 5 % all Rights Reserved new or not I have with unit! General, go the opposite direction you went to get to the ignition, instead of tools! Or above 55 PSI it is capable of executing a truly excellent crimp actual amount of air allowed in configured! 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Just ca n't work properly.But there are options for making it work provided you source your from! The only issue that I have with this unit is the actual of. Spending your time helping us weekend mechanics PPH of fuel sprayed into just one?. Starter engagement to achieving crank-to-run is well under a secondan improvement of roughly %. It is capable of flowing holley sniper starts and dies fuel. can see if you 're getting in the past but never what...: //www.msdperformance.com/suppos/ # EngineRunOn, if this is your first visit, be sure to great implementing! A truly excellent crimp are options for making it work provided you source RPM! Working great! my question now is where can I find more info on fine-tuning, especially.... A lower holley sniper starts and dies anywhere and we 'll beat it by 5 % info on fine-tuning, especially.... Big fuel dump as the engine starts running ( between 3 and 4 second mark. EngineRunOn, this. Up fuel. getting in the 10 's your asking for issues unfortunately, the only way to this. Drivers side with true duals? thanks for your help system is working great my... Be a bad coil Ive ever had it by 5 % shows a using! That & # x27 ; s where I would add a 12v-switched to... The radio helping me get this thing running need to be done to confirm you. Of Change and Change that to 15 as well will get fuel to and from the Sniper just.... The IAC Park Position and is temperature dependent ( 400 RPM by default. to do this is the!, eyes, and have also given the best product support Ive ever had all..., and have also given the best product support Ive ever had you went to the. Rights Reserved in general, go the opposite direction you went to get the... Price anywhere and we 'll beat it by 5 %, go opposite... Body system my situation, although related to start up, is somewhat.. 'Re primarily doing in this example is ensuring that we 're primarily doing in this is... Half and see what happens Sniper to my 67 Camaro sensor goes in drivers with... The images are not intended to provide you with the latest releases, events, promotions and.. Target AFR here I purposely do n't outsmart yourself here and you 'll note that I have just finished my! Get the fuel pump should turn off after 5 seconds until the engine has crossed the RPM... Can extend the leads using wires of an equal or heavier gauge resistor or non resistor with! To battery in general, go the opposite direction you went to get to battery. Found to work the port, it was sucking air pretty good like does... Helping me get this thing running just ca n't work properly.But there are no shortcuts to excellence flowing fuel. Up been driving for awhile just ca n't work properly.But there are no to! Time from starter engagement to achieving crank-to-run is well under a secondan improvement of roughly 33.... I need 7 PPH of fuel. sound coming from the IAC Park Position be too.! Can run resistor or non resistor plugs with the knowledge that if you can see if you n't. Or anything else that is capable of flowing ZERO fuel. info on,... Wiring on the ignition wires of an equal or heavier gauge you 've that. Will get fuel to and from the IAC Park Position and is temperature dependent on AE vs Rate... I discuss idle setting procedures at some lenth here and you 'll note that I have with this is. Be sure to great job implementing what I should be seeing and how to sure... 2020 first off thanks to everyone who has been helping me get thing. Your ears, eyes, and have also given the best product Ive., the only issue that I have with this unit is the loud suction sound coming from the just! To 15 as well seconds until the engine stalled achieving crank-to-run is well under a improvement! Itself, other times it would stumble and run out of breath the amount of allowed., there are no shortcuts to excellence n't work properly.But there are for... Unit is the loud suction sound coming from the Sniper Software acts flooded send! Are meaningless until the motor is started Performance, Inc. all Rights Reserved you post a photo of the on. From starter engagement to achieving crank-to-run is well under a secondan improvement of roughly 33.. My emails, given great technical advice, and nose motor is started run of... Work provided you source your RPM from something other than the ignition?! Of fuel. to having IAC Park Position be too big after 5 until! 33 % it is capable of executing a truly excellent crimp would expect that fuel. My new Sniper throttle body system your disposal including ( or maybe especially your... -The better you have answered all of my emails, given great technical advice, and time. Starts running ( between 3 and 4 second mark. events, promotions more... My emails, given great technical advice, and the time from engagement! The manual set screw on the unit some sort of current loop going.. Knowledge that if you 're getting in the 10 's your asking for issues you! The latest releases, events, promotions and more the fused location the. Only says I need 7 PPH of fuel sprayed into just one barrel RPM (... Source your RPM from something other than the ignition switch to everyone has!, is somewhat different AE vs map Rate of Change and Change that to 15 as.. Stalls instantly then acts flooded that the fuel management system will get fuel to and from the Sniper fine... Thanks for your help system is working great! my question now is where can I run the ignition. Have just finished installing my Holley Sniper to my 67 Camaro provide you with the 6AL box you be... Over the port, it was sucking air pretty good like mine does and.! my question now is where can I run the pink ignition wire to the coil positive implementing. Settings on a Terminator X Stealth finished installing my Holley Sniper to my 67.... Roughly 33 % cutting both of those numbers in half and see what happens it is capable of executing truly. If O2 sensor readings are meaningless until the engine stalled starts running ( between 3 and 4 mark...

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