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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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  3. #12
    InActive Member


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    Mar 2017
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    kenny cassady
    Vehicle
    1994 trans am
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    7

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    Thank you!!!!!!!!!!!!!!! i will try and get a scanner and send you the logs.

  4. #13
    InActive Member


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    Mar 2017
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    kenny cassady
    Vehicle
    1994 trans am
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    You all wont beleive this but my buddy told me to tap on the maf and it worked the car is now sitting and idling at 900 rpms what the hell!!!!!!!!!!!!!!!!!!

  5. #14
    Xtreme Member


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    Nov 2012
    Name
    Shaun
    Vehicle
    1994 Formula
    Location
    Phillipsburg NJ
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    Quote Originally Posted by kcassady View Post
    You all wont beleive this but my buddy told me to tap on the maf and it worked the car is now sitting and idling at 900 rpms what the hell!!!!!!!!!!!!!!!!!!
    Replace ur maf then

    Sent from my SAMSUNG-SM-G935A using Tapatalk
    2021 Charger Scat 392
    1994 Firebird Formula 381 stroker - Carrying the torch! - 9.90 @ 134.3mph on a 200 shot

    The wrench/driver for LTConvert's 94 Z28- Ellwein 383/LE Trickflows/ D1SC / CPT Ultra Pro Race 4L60E
    10.78 @ 125mph. Shooting for 9.99 for Frank Cahall!

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