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Thread: Starts, may or may not run for a few minutes or less, and stall.

  1. #11
    Join Date
    Nov 2014
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    Ont. Canada
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    1,388

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    Have you datalogged the event?

  2. #12

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    I think what we're trying to tell you is that just because it ran fine with a carburetor, does not mean it's not an installation/mechanical issue. The "installation" issues for the Sniper are mostly wiring. The Sniper is very sensitive to electromagnetic interference (EMI). Typically, we can see that quickly in a datalog. Please post your Config File and a datalog. That's worth thousands of words of explanation.

    My car ran terrific with a carb, but barely ran at all when I first cranked it with the Sniper. Why? Because the wiring that I thought I did well on was actually crap. I regrouped, studied up on wiring EFI cars, redid it and now it runs great.

    In the meantime, please describe your battery grounds. You must have a ground directly from the battery to the engine, another from battery to chassis and a third from chassis to engine. The Sniper can also receive EMI from the 12V trigger wire. How do you have that wired? I know the instructions don't say it, but it is HIGHLY recommended you power the 12V pink wire through a relay directly to battery power.

    Did you power and ground the Sniper main positive and negative directly to the battery?
    Did you put in fresh plugs? Initial base fueling is very rich and can foul them quickly.
    What spark plug wires are you running and how old? They are another common area of EMI.

    Watch this video a few times. I have probably watched it a dozen and learned something new almost every time.
    https://youtu.be/BQdQBesuJCs. Hang in there and be patient. You will get it running.
    69 Camaro
    400 SBC, ProCharger D1SC

  3. #13
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    22,701

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    Quote Originally Posted by 81 TransAm View Post
    Have you datalogged the event?
    Originally Posted by Danny Cabral
    Quick Datalogger Information:
    Always provide data, not just symptoms. Is the AFR & ignition timing optimized? Overlay the datalog onto your Config File.
    Ensure the Target A/F Ratio table is properly programmed for your engine. Ensure the ECU is "Learning" (Learn Table LINK).
    Scroll through the datalog to the problem area. Then look exactly where this happens on the Base Fuel & Timing Tables. Scrutinize:
    RPM, MAP, MAT, TPS, CTS, IAC, Target AFR, AFR Left, CL Comp, Ignition Timing, Duty Cycle, Fuel Flow, Fuel Pressure & Battery.

    Using the Holley Sniper EFI software (LINK), look at where the live cursor moves to during this occurrence, and
    manually tune that area of the Base Fuel Table (enrich or lean) & Base Timing Table (optimize ignition timing).


    I find the most helpful datalog function, is overlaying the datalog on your Config File.
    I'm in the habit of using the datalog Overlay feature every time I review a datalog.
    Click on "Datalog" (on the top Toolbar), "Activate Overlay", then "Open Data Log".
    You can literally "playback" a recorded event, and watch it as it happened on any screen.
    Minimize (shrink) the datalog window, and move it to the bottom of any Config File screen.
    Then click & scroll anywhere on the datalog, and watch it playback on your Config File (EFI software).
    http://documents.holley.com/techlibr...9r10543rev.pdf (Holley EFI Datalogger Instructions)
    https://forums.holley.com/showthread...s-amp-Datalogs (Datalog Information - Read "NOTES")
    https://www.youtube.com/watch?v=iqHO...C6FEA0BB99AF17 (How To Record & Email A Datalog)
    https://forums.holley.com/showthread...7531#post77531 (Closed Loop Datalog Tuning - Posts #2, #4 & #6)
    Quote Originally Posted by gregs69rs View Post
    Please post your Config File and a datalog. That's worth thousands of words of explanation.
    Originally Posted by Danny Cabral
    For further assistance, post your Config File and a short datalog of this occurrence for us to analyze.
    Also, review the datalog and inform us of exactly where in the datalog (time/seconds) the problem occurs.
    Datalog & Global Files can be linked to a document hosting website. I use Dropbox.com.
    Files can also be "zipped" (compressed zipped folder) & attached directly to a forum post ("Go Advanced" & "Attachments").
    Your Config File is in the "Documents", "Holley" folder, "Sniper" folder, "Config Files" folder (.hefi file).
    Your Datalogs are in the "Documents", "Holley" folder, "Sniper" folder, "Data Log" folder (.dl file).
    Someone will analyze/troubleshoot the problem & offer advice.
    https://www.youtube.com/watch?v=iqHOtDNiTNA (How To Record & Email A Datalog)
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  4. #14

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    Thanks gregs69rs. That was actual useful information. I added some grounds to be sure and tried the pink wire directly to battery power no relay in between or switching and same results. My ignition box and the Holley are direct to the battery via separate twisted pair 10 AWG wires. Engine is grounded, chassis is grounded and body is grounded. Spark plugs and wires are all new. When this system wouldn't run I swapped a carb on to check the new parts and they work. Bought a new starter today because old one died with all the starts recently between this weekend and last weekend.

    I can make the engine run a bit longer by fingering the throttle, otherwise it just dies right away. I took a datalog of two starts just recently. Both should show me fingering the throttle to try and keep it running. How do I attach a datalog? I get an error saying invalid file. its a .dlz file type.

    ( this for Danny ) Please no link to a link to a link to a link. SNIPER EFI specific info please. Remember, I'm using a Sniper EFI, Some of the terms are different compared to the multiple linked information. I need specifics, for example This one says Closed Loop Limit %. Not Learn Gain. So different terms for different systems and I have no idea if 100% means the same thing in both. If you need specific info from me give a simple step by step as I am not familiar with this system. HMM a phone call would help a lot. too bad the tech line isn't very helpful.

    What if I wired the holley to an external battery? it would be the only thing on that battery. Should it work in this scenario? I assume so.
    If I do this and it doesn't work will holley refund my money? I am very close to doing this just to prove everything I did is fine.
    Last edited by 51coronet; 09-15-2019 at 01:46 AM.

  5. #15

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    To post a datalog you must zip the file first, then you can attach it. Be sure to include your Config File as well.
    69 Camaro
    400 SBC, ProCharger D1SC

  6. #16

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    Quote Originally Posted by gregs69rs View Post
    To post a datalog you must zip the file first, then you can attach it. Be sure to include your Config File as well.
    You guys are killing me. Pretend I know nothing of navigating Sniper EFI stuff and posting it online, etc. Where is such Config File and what is it called? We have an IT guy at work and he gets in trouble for starting at step 50 instead of step 1. It ticks people off that are not IT people because they have no clue what he's talking about.

    Start at step 1 with me and use the terms that are in the Sniper EFI software. You can't help me if you can't do that. I'm trying on my end to be as specific as possible so I can be helped. This is a foreign system to me never used it and I'm just learning to navigate it. EDIT: My part number is the 550-510K if that helps.

    UPDATE: I think it attached. You don't get a Config File till I know what this system calls it. Sniper_0001.zip

  7. #17
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    22,701

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    Quote Originally Posted by 51coronet View Post
    UPDATE: I think it attached. You don't get a Config File till I know what this system calls it. Sniper_0001.zip
    It's called a Global Configuration File (GCF), and the Sniper EFI instruction manual explains how to access it & datalogs:
    http://documents.holley.com/199r11031r.pdf (Holley Sniper EFI Instruction Manual)
    It's called the Config File for short in the Documents directory of your computer. See 2nd quote in my post #13 above.
    https://forums.holley.com/showthread...8883#post98883 (Holley Sniper EFI Save Config File On SD Card, LINK - Page 73)
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  8. #18

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    Well forgive me for assuming you read the instruction manual. I assumed you read the instructions and had the file, but could not upload it. That happens a lot because people don't realize you have to zip the file first.

    I just reread yours posts form the beginning and you have had quite a chip on your shoulder the whole way. I understand you're frustrated, but that's not the approach that's going to get people to want to help. I have no idea what your mechanical & computer skills are, but the Sniper will require above average wiring knowledge. (I feel certain your issue is wiring related, BTW.) And yes, you'll have to know your way around a computer.

    Earlier you posted "So say it's rich or lean then what? Program a fuel map, curve, settings, etc.? If that's a yes, this thing is going back". The answer IS yes, so you may just want to send it back.
    Last edited by gregs69rs; 09-15-2019 at 11:52 AM.
    69 Camaro
    400 SBC, ProCharger D1SC

  9. #19

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    Config File attached. There are two folders that have GCF in the name. One is empty the other says saved GCF. The file inside is 4150_A_ZBA.sniper

    What I see is this system not fueling at idle or below a certain RPM. Carb fuels at idle that's what I see as the main difference. I notice the engine shutting down then finger the throttle and it may catch up and continue running for a few seconds, but as soon as I let the throttle down slowly it eventually dies. The engine will rev up if I finger the throttle more. If I do nothing, but start the engine it dies right after it starts.

    Ask me questions and make suggestions. Stop with the "It's your problem, you wired it wrong." That's the chip on my shoulder.
    If you suggest manipulating the software somehow please start at step 1 and use the terms in this system. It's new to me
    I don't know much about it don't assume I do. That will help immensely.
    Attached Files Attached Files

  10. #20
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
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    Quote Originally Posted by 51coronet View Post
    Ask me questions and make suggestions.
    I did. I'm still waiting for the answers to my questions in post #2.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

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