'94 Explorer, 101,000 miles. Check engine light on; vehicle sometimes sluggish. Fault codes indicate 181 and 189 adaptive fuel rich limit reached at part throttle, sys. rich, cyl. bank #1 and #2. Code 186, injector pulse width higher than expected with EARO sensor. 341, octane adjust service pin open. Any ideas?

 

check your cat and see if its plugged, check your air filter also , what engine do you have ?good luck , bob

 

Sounds like possibly a stuck open injector, or maybe a vacuum leak. Exporers and rangers like to have bad O2 sensors as well, which could be your problem, but I'd check other things first. I doubt a plugged cat. Run some fuel injector cleaner, that usually cleans up hesitation. Since the injector pulse width is higher than expected, it is putting more fuel in than it thinks it needs, possibly due to bad O2 sensors, or a vacuum leak. If it's a mass air motor, I would clean the heating element in the mass air meter, which usually makes the vehicle run lean as well.

 

that was an excellent answer , ive been standing out in the cold to long again, respectfully ,bob