Idle problems

[K5Greek]

My truck has a weird idle while it park. It will run fine when its started but when it gets warm it starts to surge. I've replaced fuel filter, egr, o2 sensor, wires, plugs, and cap. Do you think a rusted distributor could be the problem or maybe like a IAC or something? need help

 

[btolenti]

I have heard a bad coolant temperature sensor will cause this. Cheap part to replace too, should only be 10-15 bucks.

 

[erik59]

Mine did the same thing until I found out I had vacuum line off of the TBI base.

Erik

 

[K5Greek]

Mine did the same thing until I found out I had vacuum line off of the TBI base.

Erik

Yea i checked for that too and there are no leaks. For the coolant sensor im going to be replacing the radiator cause it cracked and im throwing in a new sensor so ill see if that helps any

 

[Thunder]

Check the TBI base gasket too. Pretty common for them to leak and cause idle problems.