Ford Repair Questions? Ask a Mechanic for Answers ASAP
Hi, my name is ***** ***** your scanner what are the LFT readings, on both banks?
ok, then this is isolated to the bank 2, can you pull the plugson bank 2 and see if all 3 are wet or sooty, or is 2 good and only 1 wet or sooty?
are you still here???
ok, then you either have a bad MAF sensor, or the that bank exhaust has a restriction in it, the did you just clean the MAF or did you replace it?
Usually it will effect both banks, but we have seen where the bank 2 runs rich also when they are bad, I would first have a exhaust back pressure test done on that bank, how many miles do you have on this?
then it is most likely a partially plugged cat on that bank, with that mileage, an exhaust backpressure test will verify this, the back pressure must not be higher than 1 psi at idle, if it is, then the cat is partially plugged,Tim
the maf is checked with a scanner to read the airflow when idling
at idle it should be around 5 grams a second, depending on your altitude,Tim
then that test good, you m ight have a bad injector on that bank, if one sticks open, it can cause the whole bank to read rich, can you monitor the short term fuel trim, and then disconnect each injector, one by one, and see if 2 of them change the short term fuel trim, and one does not, if so, then the injector that did not change will be the culprit,Tim
then it sounds like the outer 2 are the culprits,Tim
???? they should each drop it equally?
ok, the bank 2 middle takes to 44? is this a positive or negative?
ok, then my mistake, the center is the bad injector,Tim
the easiest way to verify this, is to swap it with the enter one on the other side, and clear the codes, and see if the code come =s back a bank 1 rich code, if it does, then you know the injector is bad,Tim