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cayenne 2008 v6 misfire cylinder 5


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I have a 2008 cayenne and misfiring intermittent with flashing check engine light sometimes it will stay solid. 142,000 miles. It will only happen when car is on idle. I hooked it up to the durametric and it shows P0768 (multiple cylinder misfire detected- upper limit value exceeded. test condition are not completed. fault is currently active and is not causing DTC light), and P0773 (cylinder 5 misfire detected- upper limit value exceeded. test condition are not completed. fault is currently active and is not causing DTC ligh). I check the coils and the plugs by switching to a different cylinder and clearing the fault code, and I will get the same p0768 and p0773. I replace the coils and sparkplug with new ones, cause its due anyways. still getting the same code. I check the fuse and relay for the fuel pump they are good. I switch the relay also see if it will make a difference. No luck. Both of my fuel pumps are running. I check those by taking the fuse of the primary and let the secondary pump run. I will still get the same error code. You guys think I have a vacuum leak somewhere? Any help is appreciated. This one is giving a headache.

 

Edited by arisg19
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