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2007 Audi A6 4.2 Misfire Cylinders 1 and 5

2007 Audi A6 4.2 Misfire Cylinders 1 and 5

 
Old 08-08-2016, 07:13 AM
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Default 2007 Audi A6 4.2 Misfire Cylinders 1 and 5

Hello,
I'm trying to figure out what is going on with my Audi A6 4.2. I have replaced the coils and plugs and cylinders 1 and 5 are still missing. I was hoping some one may have some insight to this problem. I don't want to keep throwing money at things that may not fix it. If you have anything that may help it would be much appreciated.

Thanks Justen
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Old 08-11-2016, 05:56 PM
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Is it a dead miss? Or miss under load? Injectors. Carbon issue on the intake valves. Or a lean condition at the front of the intake manifold, like an air leak, 1 and 5 are right up front, so if say the intake manifold runner flap mechanism wore out made a vacuum leak, the first 2 cylinders there are going to get leaned out more the the rest, so it misfires on them. Just some ideas for you.

Last edited by Prospeeder; 08-11-2016 at 09:14 PM.
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