i changed the IACV wiring and plug like i was told. everything is connected and i have a constant reving as soon as i start it.

its not the idle control screw. ive fully adjusted it and no difference.

i didnt switch the wiring around bc i tried it both ways

NEED HELP ASAP!

its a 2000 civic ex

thanks,

-Drew

 

I had the same problem with my civic. Make sure that there is'nt any air in the cooling system. If that doesnt work unplug the ECU for like 30 seconds then plug it back in. I bled the whole cooling system on my car and it kept surging, then I unplugged the ECU and plugged it back in and I havent had the problem since. Hope this helps.

 

Check your coolant level and bleed your coolant. Low coolant level will cause your motor to rev and air in the system will cause the idle to jump a little. The bleed port on the b16 is on the thermostat. Do not know about other motors.

 

i just wanted to clarify.....

it will slowly rev up to 4k as soon as i start it, then i kill it in fear of damage.

ill check colant.

anyone know where the bleeder valve is for a d16y8?

 

have u cleaned your throttle body lately , if so u throttle body cleany could have damaged the iac , it happens quite easily, i went thru about 4, it happens

 

i just bought the TB from S&M import auto (honda salvage specialists). so its garanteed.

what product would i use to clean it?

 

Hmm.... What about throttle position sensor. I am not sure if it would cause that but if the voltage isnt right it could. Check to make sure the butterfly valve isnt stuck in the TB. Did it start once you put the TB on?

 

Yea I heard that the TPS could cause surging like this too. I would get that checked.

 

change the throttle body and sensors.. thats wut i did

 

yea we did change the TB/IM. but we are still having the same problems, My uncle who is a mechanic came over and said that we have a vacuum leak somewhere.. so i think they are trying to find out where the leak is. he covered the trottle body with his hands but it didn't die

 

I would definately agree you probably have a vaccum leak. Just look around the intake manifold area and see if you can see a port unplugged. It should be easy to find because there arent that many ports.
good luck

 

Check the hose running from the brake bosster to the intake manifold.