i have a 90 honda accord that has a idle that revs up and down very erraticly, i changed the ICV and cleaned out the throttle body but it still does it,WHAT THE HELL IS THE DAMM PROBLEM? IAM LOSING MY MIND WITH THIS DAMM CAR!!!!

 

LOL radiator...
head gasket?
check those...
alternator?
its one ofthose i think it was the alternatorand head gasket on my friends car

 

check for vaccum leaks, I just replaced my pcv for 1.76 @ autozone and that fixed my probs.

 

how would you know if the head gasket is bad

 

well it tends to overheat as far as the engine. Im not sure dont quote me on this one less throttle response. Probably theres no blockage to keep the air in. Can anyone else confirm this?

 

See if this page helps:

http://www.cybertrails.com/~be....html

 

yo man you have an air pocket in your cooling system probobly! you need to bleed the **** outta it. and also if you head gasket is bad it is possible you will blow white smoke or you oil will turn white or your coolant will turn white. check that also run your car and open radiator capp while cold running see if it is blowing bubbles in there that means exhaust gasses are going through your cooling system blown head gasket, YOu probobly got an air pocket in there though just keep bleeding it they do that if you have an air pocket peace
ps i am an ase certified mechanic in engine repair got any more questions dont hesitate to ask

 

Check the "fast idle" valve, I've seen many in these models "stick".
Simply remove the 2 philips screws + plate/cover...+ cover the small opening
with your finger or rag/object...., blocking air passage. If the idle smooths out/ surge
stops, this is the faulty part.
(It's located on the left side of the intake manifold/drivers side.)
(of course there several other poss causes: vaccum leaks etc...)