2000 civic ex, b18c1, after market intake manifold. while daily driving i dont have issues with the idle. If i get into boost more than a little, I let off and the car will idle at 2k and stay there. If i cycle the key off and start back up it goes away. I was told it is probably the iacv. Just trying to get some other opinions/ideas on what it could be or just to confirm that it is in fact, the iacv. I can post more specs, just wasnt sure which ones were needed. thanks. I apoligize in advance if this thread has been covered a million times. I couldnt find the topic related to boost. Or if the turbo has any effect on it.

 

What ems?
Need to hook up a laptop and see what the iacv is doing not doing.
Could be the compensation tables for the ect iat etc.

 

Its on crome. Ill ask my tuner next time i see him. I didnt know iacv's were so spendy. damn.

 

You could take the iacv off and see if the screen is cogged or damaged.
You could also check the coil by doing a continuity test. I forget how many ohms of resistance it calls for but should be around 12-14.

Do you have a fitv on the throttle body? if you have it its located directly under the throttle body. google the name for pics.