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Misfires when engine warms up... help!!!

This is a discussion on Misfires when engine warms up... help!!! within the LT1 forums, part of the Vehicle Specific category; i have a 94 Z28 with the lt1 in it. it runs really good when the motor is cold but ...

  1. #1
    Junior Member
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    Elgin Il
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    Black/Blue
    94 Camaro Z28

    Misfires when engine warms up... help!!!

    i have a 94 Z28 with the lt1 in it. it runs really good when the motor is cold but after about 5 or 10 minutes, it misfires badly and shoots raw fuel out of the exhaust. i put a new optispark in it, new plugs and wires, new o2 sensors, and new fuel injectors. the mods i have are a mac cat back, hooker headers, grenatelli maf, k&n intake, trick flow elbow, and a shift kit. it ran fine before then oneday, it started doin this. anyone ever had this problem or knows anything about this??? please help me out

  2. #2
    2000pontiac6
    Guest
    wrong forum post in lt1 section

  3. #3
    Senior Member bandit95's Avatar
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    Blue GMC Canyon
    trans ams gone now

    mine does it because the o2's are messed up on my 95

  4. #4
    Junior Member
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    black
    96 impala

    if it is more evident when the car warms up,id look into the coil.

  5. #5
    Junior Member
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    blue
    93 camaro

    coil or ignition module seen them both cause similar problems

  6. #6
    Junior Member
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    Black/Blue
    94 Camaro Z28

    yeah i have tried damn near everything except the coil so i guess thats the next thing to try... thanks alot guys

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