Alright guys, about this time last year my truck had a terrible time idling. It couldnt stay still. It was like it couldnt find the right point and sometimes it would even stall out. They cleaned carbon out of the throttle body and did a few other things. Fixed the problems.. until now. It's doing the same exact thing. It seems even worse on rainy humid days with a lot of moisture. It has been has been doing the same thing lately. It either idles too high or too low and will stall occasionly. Today, leaving school it stalled 3 times. I'm just sick of the idling problems. It's the only problem ive ever had with the truck. Does anyone have any ideas? I can explain more if i need to.

Thanks

 

Clean or replace the IAC (Idle Air Control, on the back side of the throttle body). I believe there's a DIY around here somewhere.

 

How do you get to the DIY?

 

They are in the FAQ section.

 

Heavy rain problems are usually an ignition system problem.

Put dielectric grease on all points that a plug wire or coil wire connects to. Snap them firmly back into place. Also smear a bit of grease around the bottom of the distributor cap to make a good moisture resistant seal. And inspect the cap and rotor for cracks.

A failing coil can also be affected by moisture and cause sucky idle and revving problems.