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Can't Get Rid of Misfire

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Old 04-08-2014, 02:57 PM   #1
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Default Can't Get Rid of Misfire

To start, my audi had several misfire issues and codes. Since then most of the codes have been resolved except:

3 Faults Found:
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 008 - Implausible Signal - Intermittent
16688 - Cylinder 4: Misfire Detected
P0304 - 008 - Implausible Signal - Intermittent
16686 - Cylinder 2: Misfire Detected
P0302 - 008 - Implausible Signal - Intermittent

I have replaced all 4 coil harnesses. New Spark Plugs. New check valve. New suction jet pump.

After seeing the two cylinders misfire I assumed the problem was bad coils. I rearranged the coils, cleared the codes and the same three codes appeared again. Any ideas??

Last edited by Riley Turner; 04-08-2014 at 03:10 PM.
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Old 04-09-2014, 04:18 AM   #2
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1.8 or 3.0?

After all that, the only other thing to look for is vacuum leaks. I would also check to make sure your air filter is clean...
13 manual S5
03 manual TT Coupe
03 1.8t manual sport quattro with 130K
02 1.8t manual sport quattro with 205K; killed by a 4x4
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Old 04-13-2014, 12:49 AM   #3
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Bad rings or valve guides causing plugs to oil foul? How many miles?
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