M20 hard starting

[amcp]

The m20 in my car recently developed a hard starting issue. It does this if the motor is cold or has been running for awhile. It will crank for 30-45 secs then fire. Also, I've noticed that it will stumble while idling. However when it does finally start, it drives fine. Not sure where the problem is. Anyone have any thoughts?

[Scallywagon]

A good place to start is a stomp test; might reveal some electronics/sensor issues in the system, smoke test can show easily if you have any vacuum leaks.

[603Racing]

It's because you took the TRM wheels off the car... it's mad at you. Or maybe I sabotaged it because you pulled on me during that 3rd gear run with your angry 4.10's. :)

I'll bring you a FPR tomorrow, to test with.