TPS or IACV
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Joined: Aug 2004
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From: San Diego, CA
TPS or IACV
97 Civic EX with CAI and exhaust. Idle fluctuates from about 750-1200rpms when A/C is on. I checked the coolant level, its full. Also the A/C freone level is high. Would this be the idle air control valve or the throttle position sensor? Thanks in advance
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Joined: Aug 2004
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From: San Diego, CA
D@mnit, now you added two more to the list of possible problems. Seriously though, the coolant I have pretty much ruled out because I had the cooling system flushed recently, but could be a vacuum leak. With the randomness of the fluctuating I am leaning more towards a part going bad.
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From: San Diego, CA
Using the advice from a guy at h-tech.com I took the IACV off and cleaned out the little wire screen with some carb cleaner, had a lot of carbon-like buildup on it. The carb cleaner only took off some and the problem is still there. Any other tips or am I just screwed and gonna have to shell out like 4 bills for the parts.
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From: Utah
you say you flushed the coolant recently.. did the problem occur before flushing or just after?
to add something else to your list, you can check the fast idle thermo valve as well. search for the methods of correcting it
to add something else to your list, you can check the fast idle thermo valve as well. search for the methods of correcting it
Meanwhile, up in The D
Joined: Dec 2002
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http://www.ef-honda.com/ben/Badidle.php
After you do all that, and it still does it, take the radiator cap off, wrap a bunch of paper towells around the mouth, start the car, and let it run for 2-3 mins - this will "burp" the cooling system, eliminating any air trapped inside
After you do all that, and it still does it, take the radiator cap off, wrap a bunch of paper towells around the mouth, start the car, and let it run for 2-3 mins - this will "burp" the cooling system, eliminating any air trapped inside
only if all those good ideas fail 
Thread Starter
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From: San Diego, CA
I took the IACV off today and cleaned the sh!t outta the little screen with carb cleaner. The little screen looks brand new. When started it still did the fluctuating idle but once warm it stopped. I dont know if this had anything to do with me moving the idle adjust screw to reset the idle. (My dumbass neighbor messed with it) I will post more info after driving tomorrow.
...on Christ's Team...
Joined: Jul 2002
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From: SouthEast, Pa
mm...i've heard alot of people say this has already been covered, but i haven't seen any answers to it yet...i've heard of this problem more so recently...i'll be interested to see the results...good luck