Engine Performance problem
2005 Ford Mustang V8 Two Wheel Drive Automatic 55000 miles
The car is a 2005 Mustang GT, 4.6L 3V automatic. The car is factory stock no mods.
I had to change the battery, The old battery was developing a shorted cell. After changing the battery over 3 weeks ago, I now have a problem with surging idle. It hunts up and down between 400 and 750 RPMS. It is amplified with the AC on. It sets a DTC p0506 "Idle RPM lower than expected" I can't find any vacuum leaks or air leaks. I followed a learn procedure, but mine must be really dumb. It hasn't learned anything yet. The air filter is stock and new. I replaced the TPS. No difference. There is no idle air control valve.
have the same problem?
Friday, October 3rd, 2008 AT 4:21 PM