Idling Issue

[helpme]

Starts up from cold start good. As it warms up to operating temp it idles lower and lower and lower then cuts off like it's run out of gas. Never skips. Has a new IAC valve. This is a 94 3.0 OBD1. I don't have a fuel pressure gauge but the schrader valve squirts out good up to the hood. Thanks.

 

[franklin2]

Have you cleaned the throttle blade on the throttle? It gets this sticky gunk built up on it and that can restrict the air going through at idle. It contributes some idle air, and then the IAC valve makes up the rest of the idle air.

 

[superj]

i would check which ever temp sender/sensor tells the ecu that the truck is warm to. make sure those are not reading crazy because those sometimes will cause idle issues (normally high but who knows)

 

[helpme]

Won't re-start after it cuts off. Has 296K on it. You can cycle the ignition switch on/off several times and it will restart. Fuel pump relay has been changed. Thanks.