1994 Honda Accord Q&A

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

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? -
Answer 1
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 2
Coolant level correct? -
Answer 3
Change the egr valve and make sure your plugs are gapped correctly. Check your owners manuel for the correct gap -