Thread: Stumble after it rains

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  1. #1 Stumble after it rains 
    SE Level Member Blackbird87's Avatar
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    Im just going to assume that water is getting in somewhere but i dont know where or how. Car is a 99 gp no mods. First started when i drove through a puddle (nothing big) and the car would only rev to 2k and start missing, towed it home and it drove fine. Now it sometimes does it when in rains hard, The car will drive just fine but will break up at 2k. ive checked the intake and all vacuum lines but im at a loss
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  2. #2 Re: Stumble after it rains 
    GrandPrix Junkie dpzelenak's Avatar
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    check for leaks and broken hose(s) and check the intake and make sure that is still all good

    SMGPFC Member #10
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  3. #3 Re: Stumble after it rains 
    SE Level Member Blackbird87's Avatar
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    ive checked all of that but will check it again. I have no idea where it could be getting in. Could it be a sensor getting wet
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  4. #4 Re: Stumble after it rains 
    Killa Bee Scottydoggs's Avatar
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    just throwing this out there, but how are your plug wires? if they are real old (hard/cracks) they wont work well wet. or you could have bare wires at the plugs of some key sensors. (bad pig tails)

    i used to spray my trucks wires down with wd-40 when i was flood running, it helps to keep them running in deep water. if it died in the water, we would pull it out, re spray the engine with wd-40 and they always started back up after doing so.

    same symptoms as you, fighting to get any rpm out of it, and stall at idol, spray it and it would run perfect again.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  5. #5 Re: Stumble after it rains 
    SE Level Member Blackbird87's Avatar
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    Plug wires are new. Im not getting an cel either. I think i might spray the engine compartment one spot at a time to try and pinpoint an area to start from
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  6. #6 Re: Stumble after it rains 
    Turbo is the way to go. BillBoost37's Avatar
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    Quote Originally Posted by Blackbird87 View Post
    I think i might spray the engine compartment one spot at a time to try and pinpoint an area to start from
    Thats how I find these issues.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  7. #7 Re: Stumble after it rains 
    SE Level Member 3100sfi's Avatar
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    1996 Pontiac Grand Prix SE coupe - white - stock until something breaks
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  8. #8 Re: Stumble after it rains 
    SE Level Member Blackbird87's Avatar
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    Quote Originally Posted by 3100sfi View Post
    Wouldnt it miss at idle. it literally feels like hitting a rev limiter
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  9. #9 Re: Stumble after it rains 
    GXP Level Member Zef_66's Avatar
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    When was the last time you changed your air filter?
    2001 GSE
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  10. #10 Re: Stumble after it rains 
    SE Level Member Blackbird87's Avatar
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    5 months. The first this happened I ruled out the filter but opening the air box and reving it
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