i just bought my 93 del sol with a B18 turbo setup on it already. everything has been done to it as far fuel system. A few days after buying it the idle started bouncing from 1k to 1.5k, i unplugged the idle air control valve and it stopped bouncing, i called the prior owner and he said it was because of the ecu programing, not because of the valve...from what i know it is an LS1 integra ecu with some sort of programed chip. has anyone ever heared of this or do i just need an IAC valve?

 

I would start by adjusting the FITV, that sometimes will help clear up any high idle or bouncing. Especially if it is during the engine's warm up.

 

im sorry if i sound dumb but what is the FITV? and the engine revs at about 1.5k during warm up then when it is warm and has been driven is when it bounces

 

Interested for an answer also. I have the same exact problem on my turbo LSV.

Only problem is: I have a skunk 2 IM, so I don't have a FITV (fast idle thermo valve).

Sometimes it idles too low and the car quits. I think it's a vacuum leak, but the previous owner also said it's in the tune and can be corrected by a good tuner.