Honda Civic Performance - JDM Discussion Engine tech, forced induction, springs, shocks, brakes, tires, etc.

iacv test

Old 23-Jun-2007, 11:36 PM
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iacv test

Hi, i know there is a test to see if your iacv is working or not, can anyone tell me what it is, i can't find it. thanks
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Old 24-Jun-2007, 04:16 PM
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Have you searched Honda-Tech?

What are the symptoms you are experiencing? Generally the IACV is computer controlled so the car will through a code if it fails. If it's really dirty though it won't throw a code, but you will problems with your idle.

For example, if you have surging idle lets say. Unplug your IACV and see if the it stops. The car will throw a code and the idle will drop but if it stops surging then you know it's something around that unit.. Either coolant feed or internal mechanically issues.
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Old 24-Jun-2007, 07:06 PM
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so if i unplug my iacv my idle should drop? the last time i unplug it, my idle started to surge...so does that means its good?
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Old 24-Jun-2007, 07:36 PM
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yes.

you probably have a vacuum leak, or dirty fitv
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Old 25-Jun-2007, 02:01 AM
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can anyone confirm this? how can i check if i have a vaccum leak? just spray some thing around the vaccum line to see if it bubbles???
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Old 25-Jun-2007, 01:12 PM
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Well the first thing you need to tell us is what's wrong with the car?

You've asked how we can tell you if it's working on not.. If you don't have a code coming on in the car it's working.. How well it's working is unknown.
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Old 25-Jun-2007, 05:36 PM
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well the problem is when i first start my car, it will want to stall...after a while, my rpm will be around 650ish even when the engine is warm up...but after i hit vtec, my idle will be at around 1100-1200ish...
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