First one not a big deal just curious to see what it could be. My 93 at startup revs to 2k then has a sudden drop to about 1500 and raises back to 2. I have no clue as to what it could be so any suggestions would be helpful.

Second, when i drive around for a while and the car has a chance to warm up, I stop at a light and then the idle drops down to about 5-600. Should I try cleaning out the FITV and raise the idle a little??

 

Clean both the FITV and IACV - click links in my signature.

Any CEL codes?

 

Already replaced the iacv and 2 to 3 months ago so I guess its on to the fitv