So I thought I fixed it with some Fuel Injector cleaner and cleaning/replacing the positive battery terminal... Well, now my slightly rough idle is back, this time with a VERY small hint of a hesitation. It revs nicely, all the way up to 6k and back with no problems. I am getting no SES lights. All guages look good...

I'm thinking it's the IAC, but I have no real reason to think that. It's the only thing I can think of that has something to do with idle air. Because when I am driving the car, it shifts nicely, drives perfect until I hit a red light, then it starts to stumble a bit. Now, I have already had my Opti fail on me before, and trust me, its nothing like how that felt at all. I would even go so far as to say that I am 99% sure that the opti isn't causing the problems.

So what should I check? Plugs? Wires? What are some sensors I should check, and how do I clean them/test them? I could really use your help here guys, it's been bugging me for a couple weeks now.

 

MAP sensor???? IAC has carbon build up????

 

Taylor wires are junk IMO.. Id search there for the problem first. Tonight go outside and see if the wires are arching. Check at the plugs, coil and even within the middle of the wire. If yours are like mine were then they will be lighting up like the 4th of July.

 

I will check my wires, but how do you check sensors? Where is the MAP sensor, and how do I get to the IAC? How do i test the MAP?

 

TTT Going to the Track Wednesday and need to sort this out...