Okay subaru techies - I need brainstorming ideas on a misfire issue..
Car - 2001 2.5RS
Codes: p0136, p0303, p0302
Stock drive train. As some of you know, bought the car in WA last month.
When I was down there I had a local shop do a 30k servicing which included spark plugs.
Compression check was good when I bought the car.
Heads were rebuilt approximately 10k miles ago, and the injectors have also been replaced.
First misfire code on cylinder 3 happened north of seattle after pulling in a gas station. Drove the car all the way through Canada with no more misfires, and since getting back it has thrown two more misfire codes on cylinders 2 and 3.
No power loss or hesitation during driving, but I have noticed that after warming up if it sits idling for awhile it tends to idle on the rough side - I think this is where it is misfiring.
I was thinking about trying spark plugs and coils/wires next - any other ideas or thoughts about what it could be?