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Thread: car wont start with COS#5

  1. #1
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    Default car wont start with COS#5

    i upgraded my 99 operating system to an 02 operating sytem and the car runs fine. i loaded the cos5 file and then loaded the calibration file from my 02 operating system and the car starts for 1 sec and dies, wont stay on by itself or while i try to make it idle it dies. i even loaded the 02 operating system with the cos5 calibration and it runs fine. Can some help me out?
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  2. #2
    Lifetime Member Beer99C5's Avatar
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    Quote Originally Posted by articSS
    i upgraded my 99 operating system to an 02 operating sytem and the car runs fine. i loaded the cos5 file and then loaded the calibration file from my 02 operating system and the car starts for 1 sec and dies, wont stay on by itself or while i try to make it idle it dies. i even loaded the 02 operating system with the cos5 calibration and it runs fine. Can some help me out?

    Pull the plugs, bet you did what I did I have a thread here on it.

    http://forum.efilive.com/showthread.php?t=5190

    Start around post #10
    Last edited by Beer99C5; September 15th, 2007 at 01:17 AM.
    1999 C5 A-4 Convertible
    1 of 245 Nassua Blue 99 Vert's, Blackwing, LS6 Intake, 42 # Injectors, Two Stage Nitrous System- Dry and a Wet Plate, EFI Live Scan/Tune V2, 1999 PCM with 2002 COS 5 OS Custom Nitrous Panel.


    Maine USA



  3. #3
    Joe (Moderator) joecar's Avatar
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    As Beer says, you're too rich at idle, your B3647 shows AFR ~9 at idle (and also too lean at WOT).

  4. #4
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    thanks i went back and followed the tutorial and it worked like a charm.

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