Misfire Open Loop
#1
Misfire Open Loop
I have a 2003 A4 1.8t quattro.
I am getting a misfire in cylinder 3. Freeze frame data shows that it only occurs in open loop cold start. There's no misfiring while I'm driving either. Fuel trims look normal. However the fuel status changes to OL- drive on decelaration.
To troubleshoot I replaced
#3 spark plug with #4 -- Misfire Cyl. 3
#3 coil with #4 -- Misfire Cyl. 3
#3 injector with #4 -- Misfire Cyl. 3
I did a search and found it might be the diverter valve or wiring harness to the coil. Any ideas?
I am getting a misfire in cylinder 3. Freeze frame data shows that it only occurs in open loop cold start. There's no misfiring while I'm driving either. Fuel trims look normal. However the fuel status changes to OL- drive on decelaration.
To troubleshoot I replaced
#3 spark plug with #4 -- Misfire Cyl. 3
#3 coil with #4 -- Misfire Cyl. 3
#3 injector with #4 -- Misfire Cyl. 3
I did a search and found it might be the diverter valve or wiring harness to the coil. Any ideas?
#6
Re: Misfire Open Loop
when you take out the coil packs, take a look down to see if you have any oil around the spark plug.. I did on my 3.2L on cylinder 3 (v6 engine) - and solved it with a new valve cover gasket and about an hour of my own labour. on the 1.8t it should be about 45 minutes
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