Mass air flow sensor trouble
ok to give some background on this. My engine has been running rough when idleing. it is really shaky and the rpms are at about 500 it varies. I have replaced o2 sensors, idle air control, tps, and mass air flow sensor. a buddy of mine works at local parts store looked at it and told me the mass air flow was bad so i unplugged it and engine leveled off and ran great at idle. it was idleing at about 12 13 hundred rpms. still not good that was to high so i put a new mass air flow back on it and as soon as i go the new one on it still doing it anyone have a clue what is makeing the mass air flow sensor read wrong. the codes my computer give me are bank 1 and 2 are lean.
1997 RANGER XLT
4.0 V6 automatic 5 speed tranny
16 inch alloy rims (first mod)
added 2001 factory radio from areostar van. single disc and tape deck.