So last night I started the car up, and it was stumbling a lot at idle, and the check engine light and cruise light came on. Don't have a code reader, and I found a thread about the gas cap, so I made sure it was tight, then pulled the positive battery terminal. Started back up, seemed ok, no check engine light.
Now this morning on my way to work, it was stumbling at idle, and it almost stalled a few times, but still no check engine light. Any ideas? Seems like the common issues are ignition coils and/or fuel injectors, how do you tell which is the problem?
I have an appointment with the local dealer on Saturday. I bought the car from them, and they had fixed both heads due to a burnt valve before I bought it. Now I am worried that they never fixed the original problem and it's going to happen again, and with no warranty it won't be cheap.