it revs up and down at a idle,driving down the road at a stalled speed it revs on 1994 Honda Accord

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?

by in Destrehan, LA on July 25, 2012
3 answers
ANSWER by , July 25, 2012
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 by , July 29, 2012
Coolant level correct?
ANSWER by , August 03, 2012
Change the egr valve and make sure your plugs are gapped correctly. Check your owners manuel for the correct gap