Thread: RPMs stuck at 4000 with check engine light

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  1. #1 RPMs stuck at 4000 with check engine light 
    GT Level Member DWosik13's Avatar
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    My car has been seeming to be running fine lately but i was late for work one morning and decided to go a lil over the speed limit once i hit 80 my rpms just stop at 4000 and the car loses any chance of going faster. the check engine light usually comes on than off but i got it to stay on one day took it to autozone they scanned it and said it was a cylinder 4 misfire so i went home replaced the spark plug on 4 and than went out to test it and yet again same problem any ideas?
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  2. #2 Re: RPMs stuck at 4000 with check engine light 
    GrandPrix Junkie Sabrewings's Avatar
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    Did you change the plug wire?
    2004 Impala LS - got some mods sold!!!
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  3. #3 Re: RPMs stuck at 4000 with check engine light 
    GT Level Member Meemperor's Avatar
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    Plug wire, coil or bad cat.
    Lumpy Gen 3
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  4. #4 Re: RPMs stuck at 4000 with check engine light 
    Bastard Reptile's Avatar
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    Ignition module....if a coil was bad, it would be on two cylinders.
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