ive been researching threads everywhere and cant figure out whats wrong.
Originally i threw a p0135. i let it go for months then i hooked my scanner up again today and there were 6 or them now. p0135, p0171, p0172, p1135, p1132, p1151. ultimately i have replaced the fuel filter, bank 2 sensor 1 O2, and i cleaned the MAF with electrical contact cleaner from radio shack. now im getting only 2 codes which are p0135 and p1131. there are no vaccum leaks that i could find and advance discount auto couldnt even look up a PCV for it. any advice would be appreciated. i dont want to spend too much money as its my parents truck not mine and they are poor as well..lol its a 2002 F150 4.2L V6 4X2 if that helps

 

When you cleaned the MAF did you remove it from the air intake? Tried cleaning mine with is still in the intake and it didn't do a thing. I then removed and cleaned and haven't had any issues since.

 

i unplugged it and sprayed the cleaner in that little hole where the 2 thin metal wires are inside the MAF. allowed it to dry for approx 30 mins reinstalled.