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  1. #11
    LTx Guru


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    Apr 2013
    Vehicle
    1994 Formula
    Location
    Central NJ
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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/

    94 Formula A3+1: 381ci forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / Comp Cams solid roller / TH400+GearVendors OD / 4.11's/Strange 12-bolt / 300-shot (dry) N2O / Spohn Suspension / 6-pt roll bar /AutoMeter instrumentation / MoTeC M48 Pro engine management system /a few other odds 'n ends.

  2. The Following User Says Thank You to Injuneer For This Post:


  3. #12
    LTX Member


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    Mar 2017
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    kenny cassady
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    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
    LTX Member


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    kenny cassady
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    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 camaro
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    Lehigh Valley PA
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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
    1994 Z28 T56 - Le2 H/C, SBE, Hooker lt's, some rod ended suspension stuff, and a whole lotta tetanus
    The wrench for LTConvert's 94 Z28- Ellwein 383/LE2 H/C P600B/ CPT Pro Race/Pro Torque 3200

  6. The Following User Says Thank You to Tubby Z28 For This Post:


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