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Thread: Buyers Remorse - Sniper EFI

  1. #31
    Join Date
    Nov 2014
    Ont. Canada


    The WBO2 sensor should not be reading 35 AFR. Call Holley support to see if they'll send you a new WBO2 sensor.

  2. #32


    Quote Originally Posted by Danny Cabral View Post
    Originally Posted by Danny Cabral
    The Target Air/Fuel Ratio Table & Base Fuel/Timing Table (and MAP kPa & RPM axes/scales) should be configured using the Sniper EFI software:
    In the Sniper EFI software (LINK), Target Air/Fuel Ratio Table (Fuel ICF) & Base Timing Table (Spark ICF), select "2D Table" Type (not "Simple").
    The Target Air/Fuel Ratio Table & Base Timing Table can then be properly configured & tuned for any engine. (Sniper EFI Software & Holley 558-443 CAN/USB Dongle) (Sniper EFI Optional Comm/Data Cable Accessories)
    Danny, is tuning the A/F Ratio table something that I can do, or should I be looking for someone more qualified? I have absolutely no idea how to proceed with this and would be afraid I'd do more harm than good. Thanks.

  3. #33
    Join Date
    Dec 2009


    If you have to ask, then yes. You may need someone to help you, or seek the help of a professional tuner.
    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. #34


    Danny, would the AFR you posted in #26 here:, at least be a good starting point? I have the Sniper EFI software installed on my computer and have tuned a few things to a degree (AE vs TPS, etc.). I just don't know what number to plug in and it'd be great to have a baseline. Thanks.

  5. #35


    Is there any chance an overly pressurized gas tank could be causing or contributing to this issue? I have a tank vent, but it's one of the vents that's designed to prevent fuel leaking out in the event of a rollover and I don't think its sufficient to keep the tank vented with a 3/8" fuel return hose pressurizing the tank. The reason I think this is that the last time I put gas in the car, when I removed the non-vented gas cap I got a considerable blast of gas vapor in the face. I found this odd since I have the rollover vent, but in taking the vent out and testing it and realizing that it takes about 0.25 psi to close the ball bearing I realized I probably need a vented cap as well and that the pressurized tank could be causing issues with the Sniper. Any thoughts? Probably a long shot, but I thought I would bring it up. Thanks for any replies.

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