Hey!
I have had an idle air code going off for over a year, and tried many things but so far no solution!
Model: 2003 Honda CRV LX automatic trans
Symptoms:
- About once every 30 drives, the idle surges. Only after the engine is up to temp, and only when I'm lightly accelerating/braking/starting/stopping (slow neighbourhood driving). This is kind of random, and seems to happen on days where the car has many trips.
- Every drive, when the engine is up to temp, taking my foot off the gas feels like tapping the brakes. This happens at all driving speeds.
- Idle speed is ~900 rpm
- Code p0505 is reported when I scan the engine. When I reset it, it comes back within 30 minutes, whether or not the idle has been surging.
What I've tried:
- Cleaned the throttle body
- Smoke checked the engine and determined there are no vacuum leaks
- Replaced the IAC valve with a brand new one, and verified that it is working
- Cleaned the ECM/PCM's electrical terminals and lightly applied dielectric grease to connections
- Idle relearn procedure after each
Any ideas here? Looking forward to any help you can offer!