ffion

Hi
I have a 1998 Honda Civic, and right now when the engine is idle it revs between 1000 and 2000 rpm constantly. The engine is fine when the cars moving.

The car has not been driven for 3 months and there are a few suggestions of what could be the problem:
- water in the petrol tank due to condensation. The tank was 1/4 full for 3 months I have since filled it to half the idling problem is still there. If I fill the tank will this help? I guess not as the water will separate at the bottom - is there a way to drain any water?
- looking at this forum suggests I should clean or replace the Idle air control valve. Should I go for it myself - how much will a garage charge?
- sticky throttle cable (my father suggested this one)

Advice appreciated

Ffion

brookliner7

There's like 2 or three bolts holding the IACV in.
Pull it off, clean it really good with brake cleaner, then put it back on.
It it doesn't fix it, just buy a new one at the parts store, they are relatively cheap.

93civiccx2011

iac valve are not really that cheap i have the same problems with mine its been doing it fr about 5 months and still have not figured it out i have a map sensor code pulling but have put three o them on just put tps on it i have a 93 civic plan on trying the iac valve but its 170 at autozone and thats the cheapest around me

Former User

CEL codes?

anothersickhatch

It could also be a leak in the intake manifold. I had to replace my throttle body gasket in addition to cleaning the IACV.

creep403

IAC or Vac leak ... last time mine did this it was injector seal at intake took forever with a spray bottle to find it

sickrex123

just spray some starting fluid around the intake manifold and the throttle body, that should tell you if there is a vacuum leak present, also try pulling you intake tube off and plug the hole inside of the throttle body, if plugging the hole fixes the problem then you know you got a bad IAC

93civiccx2011

how do i plug the holes in the throttle body. what do mean by intake tube r u talking about the air intake

Steezer

Are you sure if you plug the TB hole and the idle goes down its just the IAC/IACV? can a vacuum leak cause suction from the TB hole or is it just the IAC/IACV?

Steezer

yea take off the air intake. the holes near the bottom left.

93civiccx2011

ok so plugging the holes stops the reving and idles normal the iacv is bad right, do i just tape them sorry just making sure not exactly a machanic just cant afford shops so i do wat i can thanks man

Steezer

no dont tape or plug it. buy a new IACV or clean the one you have. most likey you should buy one. Also go out and buy brake cleaner, and spray between where the intake manifold meets the engine. if the idle goes down when you do that you also have a vacuum leak.

93civiccx2011

well i sprayed carb cleaner im is nothing happened read another post and it said to put ur finger over the holes in the tb both holes are suckes air in them also would any one know where the hoses that go the fitv on bottom of the tb goes i have a 3 way splitter and i know thats not how it came so id like to fix that in stead of haveing it rigged up a picture would be nice i have a d16z6 motor thanks

Former User

Please use punctuation. It would make this^ comprehensible.

DPancoast

Bleed an burp the coolant system?

93civiccx2011

whats the easiest way to bleed colant system

DPancoast

With the car cold, fill your rad to the top, fill your reservoir to the max line, start car, warm it up until your fans kick on. You'll see bubbles and such from the rad during warm up but by the time your fans come on you should be pretty much air free.

After that top off your rad, put the cap on.. Shut the car off, top off your res to the max line and you're done.

Reference

http://www.team-integra.net/forum/bl...-bleeding.html

93civiccx2011

ok thank u ill try that tomorrow

93civiccx2011

would anyone happen to have a pic of the hoses to the fitv or know where they, the one i have has a plastic 3 way on it