Hello all

So my friend has a 91 accord 4cyl and after running for about 3 or 4 minutes the idel gets all screwed up. The car starts revving up and down and has a loss of power through the gears. I think that it is the ECV but he was told it was the Idle "something" valve and that piece is attached to his throttle and he would have to replace the hole throttle.

any ideas would be appreciated. Thanks