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Thread: ECU died?

  1. #11
    Join Date
    Dec 2009
    Location
    Connecticut
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    Quote Originally Posted by cwathne View Post
    I'm going to try Danny's advice with unplugging all sensors and see if it comes back to life that way. If so, I have a bad sensor.
    Not just the sensors. Ignition, Inputs/Outputs, relays, gauges, fuel pump, etc. See page 16: http://documents.holley.com/199r11031r.pdf (Holley Sniper EFI Instruction Manual)
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS T/W 11R 205 heads, 232°-244° duration/.623" lift/114° LSA camshaft, 12:1 C/R, TFS R-Series FTI ported intake, BBK 80mm T/B, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 200A 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, -6AN fuel system plumbing, Walbro 255 LPH pump, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/3000 RPM converter, B&M Hammer shifter, 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

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    Everything is unplugged now that I can unplug. Relays, HyperSpark system, output harness, all sensors. Still nothing. The ECU has a 1.8 amp draw even when everything is off except ignition (power). Right now, it looks like the ECU is dead?

  3. #13
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    Dec 2009
    Location
    Connecticut
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    Contact Holley Tech Service (LINK).
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS T/W 11R 205 heads, 232°-244° duration/.623" lift/114° LSA camshaft, 12:1 C/R, TFS R-Series FTI ported intake, BBK 80mm T/B, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 200A 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, -6AN fuel system plumbing, Walbro 255 LPH pump, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/3000 RPM converter, B&M Hammer shifter, 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.

  4. #14

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    The shop I bought it from in Norway will contact Holley. I have a longer warranty here in Norway, even if Holley does not give the local shop warranty. Maybe I can get it covered. If not, I might go for the new system Holley Terminator X MAX Stealth with transmission control.

    But I do believe there's been some stuff going on with my Sniper before it died. After I changed heads on my BBC this winter and raised the compression ratio from 8.3:1 to 10.3:1 (Also installed the cam @ 108° instead of 115.5° intake centerline). It's been hard to start kinda. Warm, cold doesn't matter. You could hear it fire but it would not get going properly. Sometimes it would, but other times it would almost backfire. I did change the Cranking Timing and Crank To Rn RPM. Cranking Fuel, but it didn't help one bit. After I installed my old Edelbrock carb and GM HEI it starts like a champ really fast. At first I thought it was something with cranking cylinder pressure being way higher resulting in lower cranking speeds. Clearly not. I have no idea why my EFI was like that, it wasn't like that before I took the engine out this winter.

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