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Thread: Sniper EFI warm start issues, NEED HELP!

  1. #11
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    29,729

    Default

    Are you using the Sniper EFI laptop software (LINK)?
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, Trick Flow T/W 11R 205 CNC comp ported heads, 232°-244° duration/.623" lift/114° LSA camshaft, 12:1 C/R, TFS R-Series FTI ported intake, BBK 80mm T/B, Holley Dominator MPFI & DIS, 36-1 crank trigger, 1x cam sync, 200A 3G alternator, Optima Red battery, 100HP progressive dry direct-port NOS, R134a A/C, Spal dual 12" fans, Frostbite 3-core aluminum radiator, Pypes dual 2.5" exhaust, off-road X-pipe, shorty headers, -6AN fuel system plumbing, Walbro 255 LPH in-tank pump & Pro-M -6AN hanger, S&W subframe connectors, BMR upper & lower torque box reinforcements, LenTech Strip Terminator wide-ratio AOD, 3000 RPM converter, B&M Hammer shifter, Stifflers trans crossmember & driveshaft safety loop, FPP aluminum driveshaft, FPP 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 M/T Street Comp tires.

  2. #12

    Default

    No, I was not aware I had this option, but I am now. More learning in my future. I was only using the little remote screen that came with the system. I have downloaded the laptop EFI software, and will see what I can do with it. My concern is, I read threads that say I shouldn't modify until the system has Learned and established its settings. The problem is, I take it out & drive it, it Learns, then won't restart, it ran awesome, and Learned how to do everything, but forgets how to start. I end up having to re run the Wizard so it will start, which zeros out the whole Learning process. So is it OK, to make changes before it's done Learning?

  3. #13

    Default

    Been fighting this for about six months now. I have two Sniper systems, one return other returnless. Engines are basically the same, Ford 460 with about 475 HP. Return system has never given me ANY issues for about two years now. When I have this no start while hot, I've checked timing with a single flash while cranking. Today installed a fuel pressure gauge, and low and behold no start. Checked fuel pressure, ZERO. Checked for power at pump, SOLID. Can hear the pump prime, wait 20 minutes, fired right up and continued on my way.
    Now, here is the kicker. Have a buddy that runs a custom resto shop, he was at SEMA. He spoke with the guys at Holley, they told him the returnless system will vapor lock. If this is true, and have no reason to doubt him, I'm a little pissed. I've spent a ton of money on this system for my Daughter's rig, now she can no longer make a quick trip into the store for fear of not starting. Or make the trip at least 30 minutes long. Feel free to chime in, as I'm just as frustrated as the rest of you.

  4. #14
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    29,729

    Default

    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, Trick Flow T/W 11R 205 CNC comp ported heads, 232°-244° duration/.623" lift/114° LSA camshaft, 12:1 C/R, TFS R-Series FTI ported intake, BBK 80mm T/B, Holley Dominator MPFI & DIS, 36-1 crank trigger, 1x cam sync, 200A 3G alternator, Optima Red battery, 100HP progressive dry direct-port NOS, R134a A/C, Spal dual 12" fans, Frostbite 3-core aluminum radiator, Pypes dual 2.5" exhaust, off-road X-pipe, shorty headers, -6AN fuel system plumbing, Walbro 255 LPH in-tank pump & Pro-M -6AN hanger, S&W subframe connectors, BMR upper & lower torque box reinforcements, LenTech Strip Terminator wide-ratio AOD, 3000 RPM converter, B&M Hammer shifter, Stifflers trans crossmember & driveshaft safety loop, FPP aluminum driveshaft, FPP 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 M/T Street Comp tires.

  5. #15

    Default

    Not to be rude, but how does your link have anything to do with hot restart issues? Had the issues happen again yesterday on the mountain, so I cracked the line to bleed any pressure on both sides, tightened line back up, and fired right up. I guess I could've my daughter crack the fuel line on a hot engine every time it won't start hot, just saying!

  6. #16
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    29,729

    Default

    Then just ignore it. Or read post #8 above instead. And if that isn't helpful either, ignore it too.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, Trick Flow T/W 11R 205 CNC comp ported heads, 232°-244° duration/.623" lift/114° LSA camshaft, 12:1 C/R, TFS R-Series FTI ported intake, BBK 80mm T/B, Holley Dominator MPFI & DIS, 36-1 crank trigger, 1x cam sync, 200A 3G alternator, Optima Red battery, 100HP progressive dry direct-port NOS, R134a A/C, Spal dual 12" fans, Frostbite 3-core aluminum radiator, Pypes dual 2.5" exhaust, off-road X-pipe, shorty headers, -6AN fuel system plumbing, Walbro 255 LPH in-tank pump & Pro-M -6AN hanger, S&W subframe connectors, BMR upper & lower torque box reinforcements, LenTech Strip Terminator wide-ratio AOD, 3000 RPM converter, B&M Hammer shifter, Stifflers trans crossmember & driveshaft safety loop, FPP aluminum driveshaft, FPP 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 M/T Street Comp tires.

  7. #17
    Join Date
    Nov 2014
    Location
    Ont. Canada
    Posts
    1,934

    Default

    The Sniper and fuel delivery are two different things. You won't fix a fuel delivery problem with Sniper settings. Find out why you are getting vapor lock. In my case, it was using an external pump and running the regulator in the front. The fuel would heat itself up as it circulated. I ended up with an internal pump with it regulated at the tank. Then, I use a single line to the front.

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