1992 Honda Prelude

Engine Mechanical problem
1992 Honda Prelude 4 cyl Front Wheel Drive 150, 00 miles

my honda has a idleling problem when its sittin steal it revs up and down between 1 and 2 grand on the tac I thought it was a vaccum leak but we did a smoke test on it and it wasnt leakin anywhere so I replaced the idle air control valve and it still does it so I replaced the map sensor to just in case and it steal does it so I was wonderin what it could be
October 3, 2010.

Hi Chucknugget,

Did you check the idle adjust screw, fast idle thermal valve and it coolant hoses, coolant level and thermostat?

Oct 21, 2010.