2000 Blazer 4.3 Hard start hot. After sitting overnight it will start ok. After reaching operating temp, if you shut it off and attempt to start with in a few minutes or longer it is a prolonged crank. Ign coil was replaced. Tested fuel pressure with KOEO, 60 psi and then drops to about 55 psi after regulator opens. Fuel pressure when running or when problem occurs is aound 55 psi. I have found that the fuel pressure will bleed down after a short amount of time with the KOEO or key off. However when the problem occurs fuel pressure is ok. Tested with pedal to the floor "ecm clear out condition" when cranking, made no difference.
Thursday, November 25th, 2010 AT 3:37 PM