Thread: new headers now vacuum leak

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  1. #1 new headers now vacuum leak 
    SexyStudmuffin copperpacecar's Avatar
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    just put new headers on my car and car ran great for 5 minutes and now i have a vacuum leak. sprayed down the motor with break cleaner thinking a hose hit the hot headers but got nothing. anyone know what can cause this and were else to look?
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  2. #2 Re: new headers now vacuum leak 
    GTP Level Member 01gpgt01's Avatar
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    Egr to lim tube?
    2001 GT. A few here and there mods http://www.streetfire.net/video/2001...ynp_208097.htm

    2009 Hummer H3 Solar flare premium
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  3. #3 Re: new headers now vacuum leak 
    SexyStudmuffin copperpacecar's Avatar
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    the egr is removed..there was a small leak in the exhaust side plug but i repaired and the lim side also got hosed with no improvement. i dont hear any more exhaust leaks but if i did have one would my car act like it had a vac leak?...also is it possible that putting in the headers cracked the heads?
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  4. #4 Re: new headers now vacuum leak 
    GTP Level Member 01gpgt01's Avatar
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    Nah You didn't crack the heads. If theirs an exhaust leak at the rear collector slip joint(not sure what headers you have) that's big enough it can Skew the 02 sensors reading because it draws in air.
    2001 GT. A few here and there mods http://www.streetfire.net/video/2001...ynp_208097.htm

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  5. #5 Re: new headers now vacuum leak 
    SexyStudmuffin copperpacecar's Avatar
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    speed daddy headers the cheap ones on sale in the for sale section...checked the collector and dont feel a leak but if it was drawing air i guess i wouldnt...
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  6. #6 Re: new headers now vacuum leak 
    SexyStudmuffin copperpacecar's Avatar
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    will a faked out o2 sensor cause the car to idle like it has a bad vacuum leak though?
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