up and down. i changed the spark plugs,wires,cap,rotor,pulled the throttle body of and cleaned it, changed the tpi sensor. do u have any other idea what it could b?
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1994 Honda Accord Question: it revs up and down at a idle,driving down the road at a stalled speed it revs
Answer #1lude22r July 25, 2012, 22:41Technician
I would recommend cleaning out the IACV and FITV valves. Vacuum leaks specially can cause a surging idle yet I found in my Honda that cleaning out both of these valves solved the problem.
Answer #2ziptie12 July 30, 2012, 00:25Master
Coolant level correct?
Answer #3Daniel Son August 03, 2012, 16:55Rookie
Change the egr valve and make sure your plugs are gapped correctly. Check your owners manuel for the correct gap