This topic contains 3 replies, has 2 voices, and was last updated by 
Bobby Nichols 2 months ago.
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Topic
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My idle surges from 1000 to 2500 constantly until I unplug my IAC valve. I have cleaned my egr ports and tried a new IAC valve but I still have the same problem? Something is telling the valve to stay wide open when it is plugged in??? Could a temperature sensor be causing it?
Thanks,
Ron
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Replies
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I guess nobody reads this forum anymore? The only thing I can think is that I put a new aftermarket IACV on and it is also faulty?? I find it hard to buy a $300 part when that might not be the problem??!! I also replaced the IAT sensor, the temperature sensor and put a different throttle body on, I have bled the cooling system several times and it STILL SURGES!! Sometimes I can hold the rpm’s at about 4000 for several seconds and then it will idle down but only until I give it more throttle then it starts surging again???
hey just read your post don’t know, but worth checking. I had an idle surge problem that was similar to this. I ended up bleeding the air from the coolant system and fixed it. ETCG has a video on the process. 02 accord f23 hope this helps.
just read your second post completely sorry have you checked for a vacuum leak?
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