So my alternator went on me and I had it replaced and now my my car has a high idle 2500rpm and the it revs up and down from 1500-2500 it comes and goes. I've taken off the IACV and cleaned it and reset my ecu still no change. Any suggestions? Maybe replace the IACV?

 

Sounds like a vacume leak.

 

Did you pull the intake manifold off to get the alternator out?

 

Me and my mechanic checked the all the lines and nothing. And no he did not pull the intake manifold

 

sounds like a vaccum leak. We heard it at the meet and we all yelled the said thing lol.

do the old brake cleaner trick, or combustion cleaner trick.

 

I would try another tb and gasket. Double check the hoses off the i/m. Fpr hose, pcv hose, booster hose and booster.

 

Thanks for the tips will be spending the day checking it out today. Will keep you guys posted.

 

If your booster leaks. It will give you idle issues. Pinch the hose and run it. See if that heps

 

So I again checked all the lines but still nothing my neighbour suggests I smoke test it to make sure. But today it only reved up on the the start but then ran smooth until night fall. I'm guessing it got cooler and it will that's when I have issues.

 

Also my neighbour suggests I just replace the IACV and if that doesn't work try a new throttle body.

 

Thats what i meant by tb. Throttle body

 

no need to replace it, just clean it. Made a world of difference for me

 

@Nizmo I did take it off and cleaned it.

 

So I finally got it all done just forgot to post. The problem was my fast air. When I took of the tb and opened the fast air it just fell out. So I cleaned the entire tb, tightened the fast air back into place, replaced the gasket and popped everything back in. I started her up and now she purrs better than ever before. She used to idle at 1500rpm now she steady at 900. I think I can pass emissions now lol

 

Good job man!