Engine Performance problem
1994 Chevy Suburban V8 Four Wheel Drive Automatic 190000 miles
Okay not sure of the category but this is what happens.
1. Upon first start of day truck will idle high and then shut off. I must turn the key all the way off and wait a few seconds and then re start the truck. The truck wiil Idle high and choke out and die.
2. I put my foot on the gas and evntually the truck accepts and the RPMs roar to 4000 rpm they hold and I release the gas pedal and then the idle drops to 150 rpms truck runs smooth.
3. All day the truck will start occasionally having idle suging issues.
* I have replaced the throttle positioning sensor which appeard to work that night the next day still had failure. I replaced the Idle Air Control Valve and teh idle was still low so I have adjusted the idle the truck appears to be idlling fine but still surges. I have run fuel cleaner through the tank.
My question is what else can be wrong? I have no check engine light to send me in any direction. I need help Please.
have the same problem?
Thursday, July 30th, 2009 AT 9:59 PM