Ok for the past four weeks i have been having idle problems, i have read all the posts about IACv and FITV's but i have had no luck. The idle on my car intermittanlty bounces from 600 - 800 (Prelude Vtec SI 1992). The car drives fine with no problems but when it is warm after about 15 mins of driving the idle will start fluctuating. I have taken the IACV unit off and cleaned it with carb cleaner and i have ran carb cleaner through the whole car and injector cleaner. i have cjecked for Vacum leaks and cannot find any. I have checked the voltage on my battery and it is running at 14.3volts. The only thing i have not checked is the FITV. Can anybody suggest anything else i can try before i take into a garage. Could it be the alternator?? or the FITV. I have also tried plugging the bottom whole on the intake while the idle is bouncing and it makes no difference.

Thanks


Rob

 

man you dont use carb cleaner on a fuel injected car when my bro's sh did the same thing we tried every thing so we took it to a place here called hondamotive and they took off his intake manifold and cleaned everything out they said it was dirt messing with the sensors and it never did it again

 

My guess would be dirt. Also, did you check the voltage on the TPS? I'm not sure that that will actually F w/ the idle speed.