Hi to all! I'm new to this forum and have a JDM Honda Inspire 2002 TypeS SSM. Live in Russia. I have a problem and can fix it about 2 years cause nothing helps me. When I accelarating and then release a gas pedal, my RPM fast go back on 750, then jumps to 1200-1500 and then slowly goes back. But sometimes its rough on the 500 rpm at stoplights. I have no touble codes, scan diagnostic does not find something strange. I put new IACV, clean throttle body, intake manifold, injectors, change spark plugs... I cant find some vacuum leaks and I didnt know what i shall to do else. Have you ane suggestions to resolve this problem? Thanks!

 

Also i inspect a MAP and an oxygen sensor - its normal.

 

when you replaced the idle valve did you also replace gaskets too???