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Thread: When RPM is held above idle (2000), engine dies in 2 seconds.

  1. #1

    Default When RPM is held above idle (2000), engine dies in 2 seconds.

    HP ECU, Terminator TBI, MSD Dual Sync with timing control, Holley 12-300 Fuel Pump. 396 BBC '69 Camaro. Engine idles fine. Last two times I started it, the engine made a small backfire or pop right before starting up. Engine up to temp (180°F). TPS at 0%, IAC at 2%, idle at 900. AFR jumping around 13.5. Then I give it gas. I can rev it up and it has no problems coming back down to idle or no hesitation. Sounds good & fine. Then when I rev it to 2000 RPM, the engine will hold for approximately two seconds, then die. Do I still need to perform another process, like letting it learn more? I don't want to drive it until I'm comfortable that everything is okay. I have updated the firmware to V5 on everything but the 3.5" handheld (laptop & ECU). Thanks, Brett.
    Last edited by Danny Cabral; 05-09-2020 at 08:06 PM.

  2. #2
    Join Date
    Dec 2009


    First ensure all this is correct: (Initial Checks & Adjustments - Read Steps #1-#6!)
    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.

  3. #3


    Thank you for your reply. It seems to be doing better the longer I let it run. I actually drove it today and it did very well. It did not cut out or hesitate while under good acceleration. Only after doing speed and letting off the gas, it wanted to die. Is there any settings on this page below that I might could tweak to help with that issue? Thanks, Brett
    Click image for larger version. 

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