Quote:
Originally Posted by puravidabahia
thanks for the input, i am certain it was bosch on the maf; i am getting ready to just replace the MAF again along with all O2 sensors to see what changes, if anything; the idling is intermittent but usually acts up after being off when at running temp and if not moving out of gear it will sometimes just stall, forcing a restart;
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To just replace parts (sensors) is not a good diagnostic procedure. Testing sensor output and function is the proper way to go.
You have already replaced the mentioned sensors with no change so it is not a problem with said sensors. The problem is as the code says. A lean condition in RPM range 2
almost certainly a vacuum leak. I see you have smoke tested for vacuum leaks and corrected some. But here is the thing a smoke test is not 100 % foolproof. You can still have a vacuum leak. Most likely in the EVAP system as your issues at refill indicate.
Your running issues are at low RPM or idle and you say it runs ok at mid and higher rpm
most likely the more RPM you give it the better it runs. Those are classic indicators of a vacuum leak. It is not a fuel delivery problem. If it was your low RPM running issues would get worse as you tried to give it RPM. Fuel delivery demand increases with engine load and RPM. It runs fine at mid to higher RPM so it is not a fuel delivery problem.
I would look at the EVAP system. There are several components that are under vacuum in that system.
Your issues at refueling are pointing right at this system.
Hope this helps some and give you a better direction to go.
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