Angelorod997
New Member
I have a 99 civic , first codes I had was idle air control Valve, knock sensor, and o2 sensor, the car jumps rpm’s at idle , but when pressing on gas or driving it’s fine , even when started up before got it will idle at one speed , but after warms up it’ll start jumping from 1500 to 2500 , changed the o2 sensor , idle air control valve, tps sensor( calibrated it ) , changed map sensor , coolant temp sensor , bled the coolant system , gauged the valves , I’m lost at wht to do now, it’s still saying idle air control valve , knock sensor and now a cat code came up but I think that’s just from the fuel/ air mixture being off but I’m not sure what to do any ideas?