Thread: im stumped please help

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  1. #21 Re: im stumped please help 
    GrandPrix Junkie idrivejunk's Avatar
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    I have left a vacuum hose unplugged and it took many days of driving before it threw a code, but it did. You could have a pretty bad vacuum leak and not get a trouble code. That much I do know, lol.
    All Grand Prix, all the time. 69 Model J, 99 GT & GTP coupes. All junk, haha.
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  2. #22 Re: im stumped please help 
    I live here. Slick2500's Avatar
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    If your temp light keeps coming on its most likely your temp sensor or the wiring, a bad temp sensor can cause all sorts of issues in these cars.
    2003 Redfire Metallic Chevy Tahoe Z71 - Airaid Modular Intake Tube, Flowmaster Exhaust.
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  3. #23 Re: im stumped please help 
    I live here. Slick2500's Avatar
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    Quote Originally Posted by idrivejunk View Post
    I have left a vacuum hose unplugged and it took many days of driving before it threw a code, but it did. You could have a pretty bad vacuum leak and not get a trouble code. That much I do know, lol.
    A lot of cels take a few drive cycles to come up.
    2003 Redfire Metallic Chevy Tahoe Z71 - Airaid Modular Intake Tube, Flowmaster Exhaust.
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  4. #24 Re: im stumped please help 
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    Quote Originally Posted by Slick2500 View Post
    A lot of cels take a few drive cycles to come up.
    could it be possible that a bad temp sensor could cause the motor to go in limp mode? because that's what its doing. that's the best way to describe what and how the motor is acting. thanks guys for all of your help so far.
    s1x cam-wbs headers-intense shift kit-intense pcm-cai-zzp 3.25.
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  5. #25 Re: im stumped please help 
    Killa Bee Scottydoggs's Avatar
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    anything is possible when one sensor talks to many others. they all start to freak out a bit.

    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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  6. #26 Re: im stumped please help 
    GT Level Member mainecrab's Avatar
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    May be good idea if you have a reader you can read live data on to see what you see when it starts running like this. So plug it in everytime you drive and if it starts pull over when can and see what you see on the live data. Maybe something is reading hot or can give you more of a clue. If your cooling seems to be working fine and you can tell the theromostat opening maybe is related to some temp sensor. I did have a similar issue I just fixed on my truck that ended up being a bad coil pack tower. Maybe when it gets hot it stops working right, which would explain your limp mode theory. I know you said you tested them but maybe try running it a while so it gets hot enough to possible have issues.

    Just thinking out loud but hope it helps
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  7. #27 Re: im stumped please help 
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    just to let everyone know it was a bad temp switch it was causing it to go in limp mode I swapped out the switch and it works great. now im having trans problems go figure.. thanks everyone for the help and advice
    s1x cam-wbs headers-intense shift kit-intense pcm-cai-zzp 3.25.
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