I have a 2012 Volvo S60 T5 , Getting 3 codes P0300, P0305 & p0304, the issue seems to be with cylinder no. 4. I have already swapped coil pack and the issue seems to stay with cylinder 4 & five. We just changed all spark plugs with new ones. Interestingly, autozone has 4 brands with different spark gaps. What is correct gap for this vehicle? All the injectors read at 14.4+ ohms, so i think these should be ok!
Question, What kind of computer and where is this located that controls coil packs input voltage & firing order? What else do i check for. Car still runs but definite misfire.

Thanks friends

Art G.

 

Have you erased the codes, I would swap the coils back to their original position, I went through the same thing, I swapped my coils when I only had a 303 after replacing plugs, I then got a 303,351 and 352, then I erased all codes and I have no misfire and no codes popping back in.

 

Thank you for your help & Yes, we did return coil packs to their original position. Cylinder no.4 is a little wet from gas though, at least it appears so. Do you know where the computer control module is located at that controls the electronic spark for this Vehicle, 2012 Volvo S60 T5. How do I know for sure if i have a Turbo? Also, where is good after market place to purchase parts for this import.

Art G.

 

Anybody have a PDF Repair Manual Handy?

 

Check compression.

But if you don't know if you have a turbo, this might be a little over your head.

 

Have you cleared out the codes? Inexpensive $15 OBD 2 scanners can read diagonise and erase codes easily. I have an MS300 and works well, a must have, especially if you want to avoid dealer and Autozone etc will not erase codes.

 

Yes, We have a turbo, as the air cleaner hose runs over the top of the engine plastic cover.