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IACV problem!

 
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Old 10-19-2011, 06:19 PM
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IACV problem!

so i had an idling problem on my 91 civic hb. untill the car would warm up, it would idle real low and even bogged out on me once. so i took idle air control valve off an cleaned with BRAKE CLEANER. now the car dies as soon as i start it. as if the iacv isnt even working. everything is connected right.

i did a google search and some people were saying brake cleaner can ruin an iacv. yet some people are saying to go ahead and use it. could i possibly have ruinned it with the brake cleaner? i dont wanna order a new one if thats not the problem

please help! D:
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Old 10-19-2011, 07:07 PM
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Re: IACV problem!

Seems there are so many hondas with idle issues this week!
Going to repost this see if it helps ya.
Go through the whole list and check it out, Also going to include the IAC has gaskets on it, brake cleaner is harmful to rubber gaskets so maybe its not seating well now.
But here goes again, Re quoting this.
"Poor idle can be caused by a number of things. You should always check for the cause in this order (order of probable cause):

- Old, worn plugs (replace)
- Old, worn distributor cap/rotor (replace)
- Old, cracked wires (replace)
- Valve adjustment (too tight will lower idle)
- Vacuum leak (check hoses and IM/TB gaskets)
- Air in coolant causing thermal valve to oscillate (properly fill & bleed coolant)
- Funky EGR valve (clean or replace)
- funky EGR port in manifold (clean)
- IACV dirty (clean)
- TB dirty (clean) --> remove MAP sensor first!!!!
- Dirty injectors (should send them to someone like RC to be rebuilt)
- Defective fuel pressure regulator (check for proper fuel pressure)
- Primary 02 Sensor (if fouled it can lower idle speed)
- Bent valves (do a compression test, then leakdown if bad, repair head if valves leak)
- Bad MAP sensor (try giving it a thwack w/a screwdriver handle)

If you have messed with any of these recently, start there first.

The idle adjust screw is the LAST thing you should look at or adjust! The idle speed is controlled by the ECU and set properly at the factory. There are no bolt-on mods that will affect idle speed. Only a valve adjustment, new TB, IM, blower, turbo, or internals should have an effect like this. Fix the root cause and you won't have to dick with the idle adjust screw. "
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Old 10-20-2011, 03:52 PM
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Re: IACV problem!

well it wont even run for longer than 2 seconds now unless my gas pedals pushed so ill have to check most of that after i get a new iacv. but isnt there rubber inside the iacv? it almost looks like a rubber spring. im not sure exactly what this is but could the brake cleaner have ate away at that and ruinned it?
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