Cleaned IACV - still low idle when warm
#1
Cleaned IACV - still low idle when warm
My 1998 civic ex auto has 148,000 mi. and lately has been idling very low when warmed up, just enough not to stall. When I turn the lights on, the idle goes up a bit makes it more tolerable. I searched a bit and was convinced my IACV needed to be cleaned. I took it apart, cleaned it, and reassembled. Car still does the same thing, possibly even closer to stall now. I haven't had any CEL (besides the one I got when I unplugged the IACV plug while the car was running to see if the idle increased, which it did). I have not noticed any vacuum leaks, but does't mean they don't exist. What do I check next? O2 sensor possibly? Any other valves or sensors? Car runs great at cruising speed - only at stop light does it idle just above stall.
#2
Re: Cleaned IACV - still low idle when warm
You'll find a diagram in the FAQs sticky (D16Y8/auto transmission) describing how to adjust the idle speed. Follow the directions exactly.
#3
Re: Cleaned IACV - still low idle when warm
Thanks. I saw that in the service manual, but the general concensus seemd to be that adjusting the screw is a bandaid fix for a bigger problem. However, I did turn the screw and the idle seemed to change momentarily then work its way back down again. Each direction I turned it, the computer acted like it compensated and brought it back to where the idle originally started. Does this sound wierd?
#4
Re: Cleaned IACV - still low idle when warm
However, I did turn the screw and the idle seemed to change momentarily then work its way back down again. Each direction I turned it, the computer acted like it compensated and brought it back to where the idle originally started. Does this sound wierd?
How did you clean the IACV? What did you clean?
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Apple395
Honda Civic / Del Sol (1992 - 2000)
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08-07-2013 12:38 PM