unstable idle

[jrbsr542]

hi, i just bought a prelude 92 si 2.3L. my problem is its a hard to start, when is started the idle shoot up to 5000rpm and come back down to 1500rpm and after that the idle keep going up and down from 1500rpm & 3000rpm it will on stop when i step to the gas pedal hard. this unstable idle is happening to even im driving esp in the traffic. please help me out on this......

thx,jojo

[sobe91184]

[quote=jrbsr542]hi, i just bought a prelude 92 si 2.3L. my problem is its a hard to start, when is started the idle shoot up to 5000rpm and come back down to 1500rpm and after that the idle keep going up and down from 1500rpm & 3000rpm it will on stop when i step to the gas pedal hard. this unstable idle is happening to even im driving esp in the traffic. please help me out on this......

thx,jojo[/quote i had a simular problem and it was the idle control sensor. it could also be the idle air control valve. it makes it hard to start because when you turn off the engine the rpms are going up as you were giving it gas, so that tends to flood it out to some exstent. the control sensor is fairly cheep, but the valve is like 250. thats fuckin stupid if you ask me. if i was you i would call some junk yards and find out if they got the part on one of there wrecked cars.if you still need help hit me up. ill be on here trying to get help with this damn [active torque transfer system] for the prelude sh.

[jrbsr542]

thx, for the info is there a way can you pin point to me where is the idle control sensor located at i know where is the idle speed control valve but i not sure where is the idle control sensor located at appreciated your help.

[sobe91184]

Originally Posted by jrbsr542

thx, for the info is there a way can you pin point to me where is the idle control sensor located at i know where is the idle speed control valve but i not sure where is the idle control sensor located at appreciated your help.

it would be hard to point out on here but if you go to the nearest auto store and pick up a haynes manuel it will be able to help you more than i could. but let me look up a little info and if you cant find it. ill try to walk you through it. but theres only a few places it could be and its gotta be on the left side bellow the radiator hoses. because it wouldnt be by the pullies or anything like that and i dont think it would be on the fire wall. i have a 2000 prelude so mines not much help for refrence but give it a shot and let me know.

[OldMan9]

Is it the idle control sensor or the idle valve sensor? Did you replaced both to solved problem or just one sensor and which one do you know for the exact? I have the same problem too right now. Thanks if you can help.