Misfire Cyclinder 4 Also Shifts Hard
2009 cobalt lt 2.2
Code shows misfire on cyclinder 4
Runs fine at highway speeds. driving in town CEL FLashes then stops flashing although it can run prefect some days no matter where I am driving.
I have replaced the coil pack, spark plugs
It also shifts hard
Looks like there is not an ignition control module or I can't find it. I was going to replace that next. I also was thinking about replacing the fuel injector.
Any other suggestion would much wecolme.