when i start my car it turns over and starts but its like its about to stall out, it has done it once or twice but mostly the tach drops and then goes back up after a few seconds, also when im driving sometimes its gets very sluggish, do you guys know what it could be, i just replaced the pcv valve, so i dont think its that, maybe egr?

-thanks

 

Hmm does it only do it when the engine is cold or does it continue to do it all the time after its warmed up to normal operating temps?

 

any check engine lights come on? how many miles? trash in the fuel line, fuel filter clogged?

 

Almost sounds liek the iac may be acting up, but it would help greatly to know what Scothew asked as far as when it actually has the problem.

 

Yeah the IAC was my guess, but more details on when it acctually happens is what would help determine.

 

when it warms up it stops..but the car has never done this before, when it was cold..is it normal?

 

It really sounds like the IAC then, to me at least. It is far from uncommon for them to start sticking on a 4.6. You can take it off and clean it with some carb cleaner if the problem continues. That may fix it for a while. No need really to replace it until you try cleaning it first.

 

Mine will have a hard start every now and then when it's cold... and if i shift hard into 2nd when its really cold outside it chokes for a quick second... :-/