Not all the time but sometimes when i stop or slowdown almost to a stop it will idle down to about 200-400rpms. So far ive cleaned the MAF, IAC, and throttle body. i bought a new IAC to see if it was bad but no change still does it. Also sometimes when im stopped at a redlight it feels like it bucks a little. and if i pull off the pcv how would i diagnose if its good or bad? what else should be checked for this idle problem? thanks for all help in advance

 

Try replacing the gas cap. I had the same problem with a Blazer and wasted a lot of money on unneeded new parts. After realizing my idle problem was more prevalent when the tank wasn't full I put a new cap on and it's been fine ever since.

 

maybe you have a leak of air somewhere in the intake

 

Can't hurt to try that. How could I figure out if there is a leak in my intake

 

Spray ether or starting fluid around it with the truck idling. If it idles up you've got a leak.
Don't be heavy handed with the spray. Too much can be a bad thing.

 

So just spray the starting fluid around the hoses and gasket? And I don't have a CEL so you can still have a leak with out a CEL?

 

You've got the idea.
If you find a leak this way I would check all of the nearby hoses real good before deciding it's a gasket.

 

Thanks man ill give it a try here in the next few days when I get some time and ill let yall know what happens

 

a bad pcv would more likely cause a high idle not a low idle.
you could check it though if it rattles it's good.

before doing anything i would reset the computer and see if the problem goes away after the engine learns new fuel air trim.

 

Ok just disconnect the negative battery cable for fifteen minutes to reset it right

 

yep

 

got that done now should this fix it automatically or do i need to drive it a few days before it resets?

 

i tried it and drove it around town and it still does it pretty bad i got some starter fluid gonna try that maybe tomorrow

 

what i do after a reset is let the engine idle turn on all accessories high beams fan etc, turn the wheel lock to lock a few times then shut all power stuff off and let it idle again for 5 minutes then drive.

 

I would try pulling off the vac. hose to the egr valve with it running and see if the idle smooths out. I am purchasing a pressure feedback sensor for my truck now.