HELP! My 1998 V8 car will not idle when started. Problem occured after bleeding air from cooling system and allowing radiator fans to cycle a couple of times...everything normal at this point. Three hours later...car starts as normal...everytime, but will not idle. I have since determined that once started, if RPMs are kept high and gradually lowered, the ECU figures out how to idle. The car can be driven but any acceleration above gentle results in a huge bog. When the car stops, the engine may or may not die depending on whether or not I maintain a higher RPM and gradually lower it. On