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Thread: Unusual idle occurance after injector replacement/IFR adjustment

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    Junior Member
    Join Date
    Jan 2008
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    Default Unusual idle occurance after injector replacement/IFR adjustment

    I went ahead and installed a set of injectors I purchased a while back, Accel 42# units as I recall, and after adjusting the IFR to match I've been able to get the car running, however I have the strangest of occurances when the car first starts. For the first 3-5 seconds my LC1 is reporting normal AFR levels (14.6-15.0), but the engine then immediatley changes tone and begins to chop very heavily, almost to the point of stalling and all the while the LC1 begins to report excessivley high AFR levels of 20+!! This will last for approx. 45-60 seconds with no input from me after which the engine magically "snaps out of it" and resumes a normal idle tone and the LC1 immediatley richens up to normal levels. Now i'm not 100% sure on the accuracy of the LC1's readings during the abnormal phase simply because of the heavy lope/reversion and it's possible effects on the numbers but there is no doubt something fishy is going on here.

    I'm attatching my current map in the hopes somebody might catch on to something I've overlooked in my quest to bring my car back to 'normal' since the injector swap, any help or input is much appriciated
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