Never ending CEL...
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Joined: May 2005
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Never ending CEL...
Started as intermittent flashing..turned out to be a cracked vacuum line. Cleared the codes - life was good again. Shortly afterwards, CEL came on and stayed on.
VAGed the vehicle and this is what I've done to try to get the CEL off.
Replaced plugs and ICP
Replaced three of four Oxygen sensors
Still shakes at idle and stutters when doing a constant speed of 60-65 mph.
DTC's: Multiple Cylinder Misfire and cylinder 6 misfire.
Bad spark plug - ICP???
Going to check cylinder 6 tomorrow..don't know what else to do.
Definitely open to suggestions. Thanks in advance.
VAGed the vehicle and this is what I've done to try to get the CEL off.
Replaced plugs and ICP
Replaced three of four Oxygen sensors
Still shakes at idle and stutters when doing a constant speed of 60-65 mph.
DTC's: Multiple Cylinder Misfire and cylinder 6 misfire.
Bad spark plug - ICP???
Going to check cylinder 6 tomorrow..don't know what else to do.
Definitely open to suggestions. Thanks in advance.
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Joined: May 2005
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VAG results stated that my O2 sensors were bad and needed replacing. How do you know when the coolant temp sensor needs replacing? Where is the coolant temp located? Would the coolant temp sensor have anything to do with the loss of coolant? My coolant sometimes purges itself..I'm guessing from the coolant tank but I could be wrong. Just want to narrow down all possibilities before I assume that it is my after-run pump. Where would the coolant lie when an after run pump goes bad? When I did my driver side front O2 sensor, I didn't see any coolant under the "Y" pipe. Thanks in advance.
Last edited by audiphobic; Mar 28, 2009 at 04:45 AM. Reason: needed to add more information
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Look at the tech article about the coolant afterrun pump. You'll see coolant residue on the top of the engine, probably on the passenger side.
<a href="https://www.audiworld.com/tech/eng69.shtml">check this out</a>
<a href="https://www.audiworld.com/tech/eng69.shtml">check this out</a>
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problem solved....
Turned out to be cylinder 6's spark plug had backed out a bit. The gap was totally off also. The alarming thing was that it had some oil on it..could be due to the spark plug not being tight (?) Cleaned it up, gapped the plug and reinstalled. Cleared the DTC and now I'm ready for my inspection. Thank you all for all the help.
Last edited by audiphobic; Mar 28, 2009 at 10:46 AM. Reason: spelling
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Audi 90 / 80 / Coupe quattro / Cabriolet
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