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need help f150 throwing fault codes

Old 11-03-2010, 04:55 PM
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Default need help f150 throwing fault codes

need help f150 throwing fault codes. I need help my parents f150 is a 2002 2wd 4.2 v6 and she is running like a slug. Gave her a tune-up thinking it might fix it but didn't help, i changed: plug, wires oils all that good stuff but it keep on jerking during acceleration and a little bit during idle every now and then. We took it to a mechanic and he told us it's the gaskets for the intake manifold, dose anyone have any experiences with this problem? How many different gaskets will i need and well I'm in there is it recommended to change anything else while I'm at it?
Thank you all For Your Help.
Old 11-03-2010, 04:58 PM
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fault codes are: system to lean bank1 po171, system to lean bank2 p0174.
thank you for any help.
Old 11-03-2010, 05:42 PM
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The 4.2 is known for these gaskets goin bad...

see the other thread you posted in


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