I have a 87" Chevy 1 ton crew cab 4X4. Three years ago I installed a new 502 cu. in. with Edelbrock multiport injection. About 8 months ago whenever the truck is warm and the outside temp gets warm over 80'. If I stop like to get gas for 5 minutes the truck starts okay, but it doesn't want to idle at all. I've used another computer chip same thing. Next step is the dealer and talking to them they don't know going in.