About 2k miles ago I got a cylinder 2 misfire code. Took it to my local dealership where they came back and told me it was actually cylinder 3 and they replaced the spark plug and coil. Now I'm getting another cylinder 2 misfire code and rather than spending $350 I'm considering replacing it myself for $40. Two primary questions:
- Is it even worth going back to the dealership and trying to argue that they misdiagnosed or is it a lost cause?
- Should I replace the other spark plugs when I have the plenum off? I've got 60k miles and only 3-4 hours at night to work on the jeep. Should I just wait?