2003 Explorer Stalling Bank 1 Too Rich

[gwp026]

2003 Explorer XLT 6 cyl with about 93k on it. Had a full tune up last year. Ran just fine until about a month ago. Started randomly stalling at stops and occassionally sputtering when accelerating. Doesn't seem to matter if the engine is hot or cold. Will intermittently throw a CEL for Bank 1 Rich. There are no vacuum leaks, the coil pack is new, the O2 sensors seem to be working fine. Fuel pressure is good. All I have is symptoms but no signs. The car drives fine for a few days, then it gets tempermental. Any other suggestions?

 

[esclamada]

try cleaning your MAF first with MAF cleaner and see if it helps, if not then proceed to cleaning your throttle body (with throttle body cleaner) and IAC.

did the tune-up replaced the PCV valve and air filter too?









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