Thread: 1997 gtp sometimes only hits 4k rpm

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  1. #1 1997 gtp sometimes only hits 4k rpm 
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    I just recently gave it a tune up and the car was running beautiful,but every now and then it wont go past 4000 rpm if i rev it,also my supercharger wont kick in it will show about 1 to 2 bars on the boost......any sugestions on what i should change or check for???
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  2. #2 Re: 1997 gtp sometimes only hits 4k rpm 
    Donating Users Ibwrong's Avatar
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    Are you revving it in park?
    2000 GTP - Project
    2000 Mustang GT
    2006 Charger
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  3. #3 Re: 1997 gtp sometimes only hits 4k rpm 
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    Yes ill rev it in park,only wen i notice the rpm will kind of jump to 1200k.....i always let the engine warm up a bit befor i drive off
    then wen its been running for about 20 mins ill hit the gas(not flooring it) just enuf for the boost to kick in and it will only get 1 or two bars
    KIND OF A HESITATION LIKE THE SUPERCHARGER WANTS TO KICK IN BUT WONT
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  4. #4 Re: 1997 gtp sometimes only hits 4k rpm 
    DUI BABY Bio248's Avatar
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    if youre not moving there is a rev limiter at 4k.

    you wont get full boost unless you put the pedal to the floor, that is a given.
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  5. #5 Re: 1997 gtp sometimes only hits 4k rpm 
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    Kool i didnt know that....but still even wen i drive it wont kick all the way on even wen i floor it
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  6. #6 Re: 1997 gtp sometimes only hits 4k rpm 
    DUI BABY Bio248's Avatar
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    you boost bypass valve solenoid is junk or you have a vacuum leak. i'd suggest searching around the forum for some clues.
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  7. #7 Re: 1997 gtp sometimes only hits 4k rpm 
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    kool man,thanx for the help.....1 more question....wer is the selenoid located......also how do i thank u on this site here
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  8. #8 Re: 1997 gtp sometimes only hits 4k rpm 
    DUI BABY Bio248's Avatar
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    the solenoid is located on the front of the blower near the throttle body side. it looks like a little black, plastic mushroom. the problem is the solenoid below it (the little black box). if you pull the vac line from the solenoid (plug it) and leave it open when youre driving and you get full boost then your solenoid is junk.

    the 'thanks' button is on the lower right of everyones posts.
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  9. #9 Re: 1997 gtp sometimes only hits 4k rpm 
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    thanx ....lol couldnt find the thank u button
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