[07_9-3]

2007 9-3 2.8T with 105k. Just replaced all ignition coils and spark plugs 5 months ago. Last month check engine light came on. Code says cylinders 2,4,6 are misfires. Now, sometimes only 3 cylinders fire, can tell by hp cut in half, although I turn car off, mid driving, turn back on, and the other cylinders kick in. Looked at a couple of youtube videos and got nada. Any thoughts or suggestions would be GREATLY appreciated.

 

[Diggs]

I'd guess ECU might be on its way out.

 

[davmac]

Look at a wiring diagram. Is there a common ground / signal for one side of engine coils or fuel injectors?

 

[first-saab]

Did you reconnect the groung wire on the ECU correctly when you did the coils?

 

[07_9-3]

solved it

Was the 02 sensor. Thank you everyone for your assistance!!!

 

[Diggs]

Was the 02 sensor. Thank you everyone for your assistance!!!

How did you determine this?

 

[07_9-3]

misfire

hunch. car has 106k and I read they can start going bad. Changed it and no misfire. Still getting a pending error code on a slow cam response, not sure what that is about but at least it's firing on all cylinders

 

[slobo7x]

How did you determine this?

what he said! lol