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Cold Start troubles

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  • Cold Start troubles

    Hi all - I wonder if anyone can point me in the right direction - I've been having some issues with cold start of late - now this may be related to a temperamental IAC valve but currently I seem to be throwing in more and more fuel into the start fuel factor table (hence the odd number at 20 degs) but not really getting very far.

    The car does fire - then goes out - this is repeated maybe five or six times before finalyl is fires and goes to roight and then smoother idle.

    I thought I'd ask for help as I', not sure if I'm going over the top in the this table or whether I should pull back the start fuel factor and use some increased values in W-U enrich multi or P-S enrich multi..

    Cal file is here:

    I'd really appreciate some input here.



  • #2
    In menu M4 - IAC Tuning change the IAC position 0 RPM parameter to 80% or 90% compared to the 20% that is there now.


    • #3
      Thanks Ian - did the numbers in the start fuel factor table look reasonable to you? I was thinking I should pull that 4.5 @ 20 degs back to 3.5 as per 10 and 30 degs - though I imagine the minimum 'working' value is what I'm shooting for?


      • #4
        So I went to 80% on the IAC position 0 RPM parameter - it did seem to help initially (the car had sat for say 7 or 8 hours before i restarted) - then once again this morning the starting trouble re-occurred - again 6 or so attempts before it fired up and idled - I'm wondering if the IAC's somewhat erratic behavior (it does occasionally fail to prevent stalling but mostly returns perfectly to idle once warmed up) is to blame.


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