i know, its probably somethign simple but ive changed my iacv two times and my car still idles from 0 to 1500... it doesnt do it when i first start up the car but as im driving and the car warms up itll idle when i stop or put it to neutral.....it happend right after i got my valves adjusted.....i dont think that will make it idle like that cause it did that to my hatch and all i did to stop it is changed the iacv and it stopped....please help.......thanks....

 

no one knows.......its my daily car too.....no it idles from 1000 to 2000 now.....it bounces back n forth....lmk know guys.....

 

You could have air in your coolant system

 

Do you have a CEL?

 

I have the same exact problem. Even replaced with a new iacv. I'm thiking maybe the tps or. Vac leak? It will surge then I barley tap and hold the throttle and it bounces back and fought throws a p0505 cel code

 

look here----->https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/problems-idle-iacv-code-14-p0505-look-here-2127246/

 

thanks alot dude. already replaced my iacv just gotta trouble shoot it now.

 

have you guys made sure your IAC valves don't have a re-learn procedure? Many cars have to have the idle relearned after replacing the valve. It usually entails driving the vehicle at over 30mph for a certain period of time. If it's not the relearn, I'd go for vacuum leak next. Start spraying vacuum lines with carb cleaner and see your idle races. If it does, you know where your un-metered air is coming from.

 

ive had the same problem, and it was the IACV needed to be adjusted

 

I have had the same issue. You have to let it relearn the idle. Just turn on the car and make sure that nothing is on like your radio or the ac and stuff. Just let the car sit till the fan cycles about twice and it should relearn it or at least this is what i do cuz every time i unplug my battery i have to relearn the idle. Also You can take of the cap to the radiator and squeeze the top radiator hose just in case you have bubbles in the system while the car is warming up, once it starts getting warmed up just put the cap back on. Hope this helps