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  1. #11
    LTx Guru


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    Apr 2013
    Name
    Fred
    Vehicle
    1994 Formula - SOLD
    Location
    Central NJ
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    2,279

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    The problem with erratic idle will not turn on the SES light or set a code. Here's a thread where I was able to trace erratic idle to what appeared to be bad data coming from the MSD Opti opticalcam position sensor. This is actually the third MSD I have found with that problem. Tubby Z28's was the second one. Both of those data logs, with my analysis, have been sent to MSD. They are trying to have the third case Opti returned to them so they can do some investigation.

    Not saying yours is necessarily the same problem, but if you could run a data log using Scan9495 I will take a look at it.

    http://ltxtech.com/forums/showthread...-Cap-and-Rotor

    Problem analysis starts at post #36.

    Scan9495 free download:

    http://www.firebirdnation.com/forums...495-lt1-obd-1/
    SOLD - GONE TO A (VERY) GOOD HOME ! - 94 Formula A3+1: 381ci forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / CC solid roller / TH400+GearVendors OD / 4.11 Strange 12-bolt / 300-shot N2O / Spohn Suspension / roll bar / MoTeC M48 Pro engine management system /a few other odds 'n ends.

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