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car runs like crap!!

This is a discussion on car runs like crap!! within the LT1 forums, part of the Vehicle Specific category; i start the car it cranks over about 2 times starts, today the rpms stayed at 2000rpms at start 10sec ...

  1. #1
    Junior Member
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    Unhappy car runs like crap!!

    i start the car it cranks over about 2 times starts, today the rpms stayed at 2000rpms at start 10sec later then it comes down to its normal idle 900, then does this (loopy cam) shake (rpms go 200 to 1000 up and down) barley staying running, just a hair from dying, rev it sounds normal, 5k revs smooth no back fires nothing, then when you go under 1000 rpms it starts to bounce up and down, today after a 5k rev i bring it back down to 1000rpms let off ran sound fine then stumbles then car shakes hard small heist engine died, before that it would stay running just bounce off the low rpms just about to give up and stop running, what would cause this? , anyone got an idea?

  2. #2
    Dead 02 T/A M6 lakmflx's Avatar
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    Red
    02 T/A WS6 M6

    I would suggest checking the normal stuff like spark plug wires, spark plugs and air fuel mixture and go from there.

  3. #3
    Member camarolvr69's Avatar
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    Silver
    1997 camaro z28

    have you checked/changed your cat recently? my 1997 was running like crap cause the cat crapped out on me. If it is the cat, dont take it to a dealership. They gave me an estimate of $1100 for one cat so instead im getting new exhaust from the heads back
    Also might want to check fuel system ie: fuel filter

  4. #4
    Junior Member
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    black
    1993 Vette

    if it runs fine under normal load but poor at idle
    has the car been modified?
    if not check the IACV (idle air control valve)
    if you have aluminum flywheel the idle speed will need to be set higher to keep the proper rotating mass to maintain the engine happy

  5. #5
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    mystic
    95 LS, yes it says LS

    Quote Originally Posted by 93lt1vette View Post
    if it runs fine under normal load but poor at idle
    has the car been modified?
    if not check the IACV (idle air control valve)
    if you have aluminum flywheel the idle speed will need to be set higher to keep the proper rotating mass to maintain the engine happy
    What he said.

  6. #6
    Junior Member
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    white
    91 camaro

    Your O2 sensores could be going bad, when mine went my car ran like crap, idled hard and didn't want to go anywhere

  7. #7
    12.36@109 Red on Red WS6's Avatar
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    Red
    1996 Trans Am

    First lets with basic questions. Do you have a check engine light on? Have you done a tune up lately? Was it an all the sudden or did you notice the car slowly running like crap?

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