2003 T6 misfiring need help

bulldog80 · Post by **bulldog80** » 03 May 2011, 16:10

Our 2003 T6 started idling rough all of a sudden and CEL came on. Pulled the following misfire codes P0300, P0303, P0304, P0305 and also the following ignition coil codes- P0353, P0354, P0355, P0356. I don't believe it's an ignition coil due to the multiple cylinders all at once. I'm suspecting the crankshaft position sensor but any help from you guys would be much appreciated.

bulldog80 · Post by **bulldog80** » 18 May 2011, 22:56

Well I added some seafoam in case it was some bad fuel and had it running ok for about a week and then it started to doing the same thing again. I can't even get it to start now. It cranks but wont run. I've replaced the crank position sensor, spark plugs, cleaned maf. I can hear the fuel pumps run and I've tried to get it to start with starting fluid with no luck. So, I'm assuming it's not a fuel problem. I'm going to put a fuel gauge on it and find out for sure. Temp readings look ok when I check it with my scanner. Is there any other sensors that affect the ignition coils working?

Any help would greatly be appreciated at this point. Nearest Volvo dealer is 200 miles away.

volvodoc · Post by **volvodoc** » 24 May 2011, 13:14

ck wiring harness going under top cover for damage as well as the two ground connec tions on the head

bulldog80 · Post by **bulldog80** » 26 May 2011, 20:45

Thanks for the reply volvodoc. I'd figured it out, but it took me a while. I wish I would have gotten your advice a week ago. It was one of the ignition coil ground wires. Just loose enough.