Lose the iridium plugs, go with the NGK V-Power copper plugs gapped to .8MM

Verify your timing and check to see that your IAC is working correctly.

Does it do this free revving, under a load, cold, warm, give me more info...SPECIFICS!

 

my iac. my idle air control valve. how do i check that?

 

it will do it more cold, less when vehicle is at operating temp. here is my phone number call me and ill call you back if you do want the long distance charges 615.589.1161