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  1. #1 Vacuum Leak Help 
    RichardL12
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    Default 06-01-2010
    I have an '02 grand prix and I think it has a vacuum leak. When I start it the RPMs rise and drop a little bit and sometimes it idles higher than normal. Also i dont know if this is related but after the car is turned off if you try to start it again it cranks a couple of seconds before starting. I tried spraying brake cleaner to find the leak but had no success. What are all the parts/lines that I should be spraying? Could it be something else? there are no codes in the engine. Thanks for any help
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  2. #2 Re: Vacuum Leak Help 
    TheOtherNick
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    Default 06-01-2010
    sounds like a bad fuel pressure regulator. Check and see if it is leaking gas into the vacuum line.
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  3. #3 Re: Vacuum Leak Help 
    RichardL12
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    Default 06-02-2010
    Quote Originally Posted by 01GTP View Post
    sounds like a bad fuel pressure regulator. Check and see if it is leaking gas into the vacuum line.
    Alright thanks. I will check this out when I get a chance. Whats the best way to check it?
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  4. #4 Re: Vacuum Leak Help 
    RichardL12
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    Default 06-02-2010
    I checked the Vacuum line on the regulator and there wasn't any fuel in there. Is there something else I should check with it? Is it something else?
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  5. #5 Re: Vacuum Leak Help 
    TheOtherNick
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    Default 06-02-2010
    If you have a vacuum pump you can apply vacuum to the regulator and see if it holds vacuum. If it drops off you need a new reg.
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  6. #6 Re: Vacuum Leak Help 
    CTKGP09
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    Default 06-03-2010
    might as well clean your MAF sensor too, just to be safe
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  7. #7 Re: Vacuum Leak Help 
    RichardL12
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    Default 06-03-2010
    Quote Originally Posted by CTKGP09 View Post
    might as well clean your MAF sensor too, just to be safe
    I just replaced the MAF recently because it was bad
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