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Whaler · 10-11-2012, 08:16 PM

We have a problem with a 5.3 in a 2000 Chevrolet Truck. When coasting to a traffic light, it will idle up. When put in neutral, it will go to 1,200 rpm. Also, it will delay shifting as if in the tow/haul mode. Also, after sitting for a while, it will temporarily run fine. Any ideas?

10-11-2012, 08:16 PM	#1
Whaler Moderator Join Date: Dec 2006 Location: West Ashley Posts: 2,498	5.3 Idling Problem We have a problem with a 5.3 in a 2000 Chevrolet Truck. When coasting to a traffic light, it will idle up. When put in neutral, it will go to 1,200 rpm. Also, it will delay shifting as if in the tow/haul mode. Also, after sitting for a while, it will temporarily run fine. Any ideas?