91 won't start in cold weather?
I have a 91 yj. 4.0L. Engine is basically stock. When it's warm out, say above 50, the jeep starts fine. When it's cold it won't start. The engine will crank but there is no spark and no fuel.
Could it be the ecu? I would try a new one but they're rather expensive and I still don't know if this would fix the problem.
Sometimes when it's around 50 the check engine light will flicker very rapidly and I can hear a relay clicking. After a minute the light will come on solid and then the jeep will fire right up. Is there some other sensor that might be temperature sensitive that would cause the ecu to shut down the engine and not allow it to start?
Thanks for any help!