help!!! P0171 never ending battle
ok as some of you know i have been fighting the natorious lean bank 1 code and i have done the cable cleaning at the fender and block under the # 1 cylinder i volt tested the PCM grounds cleaned the entire throttle body and replaced the O2 sensors with ac delcos checked vacuum at the tree and had a steady needle right on the dot for perfection same with the fuel pressure (running motor i have 48 PSI) all of the freeze frame results are fine only fuel trim i am unsure of. i had a LT fuel trim of 16.4 steady and a pulsing at idle ST fuel trim of 12.5-13 thats my only concern even alldata had no info on fuel trim stats but all other parameters are ok and are in perfect range.
i am at a loss now i have no idea what it can be anymore did i miss a ground i went over everything that you told beaujo700 to do in his thread i.e grounds, plug wires on O2, vacuum leak, injector pulse, etc. please i need some really bright light shed on this one before i go insane.
oh i have nothing much done to my car i have flowmaster muffler, magnaflow high flow cat, and a CAI with K+N filter