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Missing???

This is a discussion on Missing??? within the LT1 forums, part of the Vehicle Specific category; My 94 Z-28 has been running good then it started missing and feeling like it has about half the normal ...

  1. #1
    Junior Member
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    Black
    '94 Z28

    Missing???

    My 94 Z-28 has been running good then it started missing and feeling like it has about half the normal power. It only runs half-ass decent at 3grand down the highway and don't wanna wrap on up past 4grand WOT unless i burp the throddel. It has fresh plugs and wires. I was told it just had the whole ignition replace. Any1 else had this problem?????

  2. #2
    Pathelogical Liar BlackLT1Z28's Avatar
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    Black
    94 Camaro Z28

    How many miles on it?
    If you just got new plugs and wires, it could be the opti going out.

  3. #3
    Junior Member
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    '94 Z28

    its got 117000 miles and the just did 1800 dollars worth of stuff gettn it ready

  4. #4
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    black
    1993 Vette

    do you have any waring lights

  5. #5
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    '94 Z28

    The Service Engine Soon light will come on and it will run a hell of alot better than it wuz but when it goes off it goes back 2 missing and popping. and im just bouncing around in there it seems like.

  6. #6
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    1993 Vette

    it is posible that you have an FI problem whe the service engine soon light comes on and the car runs better its probably because the computer swithed or open/closed loop to limp home mode. normaly though you will have a fault code in on any part of the FI thats not working corectly but that system dosn't always work

  7. #7
    Junior Member
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    Purple
    1996 Formula

    crap i need to post 5 times to give you this freakin site to check your ignition.. well here ocmes a mini post whore

  8. #8
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    Purple
    1996 Formula

    Quote Originally Posted by LT1Redneck View Post
    I was told it just had the whole ignition replace.

    sure?

    why odnt u do a test on the ICM and what not and make sure it isnt a spark prob. also you can check your Fuel pressure on the back of the manifold you will find on the fuel rail there vavle to check FPresure.
    heres your ignition test that runs through the ICM coil and opti to let ya know your prob... http://shbox.com/1/4th_gen_tech2.html#opti_test

  9. #9
    Member Chad97z's Avatar
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    I had a sticky injector and the engine would misfire. Not backfire, but misfire. (engine lope) Next time it happens, you can check the injectors by listening to them. Get a stethescope and put it on each injector and listen for an irregular ticking sound or possibly no ticking. It ticks when the injector opens or closes. If its not ticking, its not working.

  10. #10
    LT1 Guy
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    Quicksilver
    03 Corvette Z06

    what are the codes it is throwing?

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