PsYcHo_FrEkE
Member
- Joined
- November 2, 2013
- Messages
- 42
- Reaction score
- 0
- City, State
- Georgia
- Year, Model & Trim Level
- 1997 Ford Ranger XLT 4.0L
I'm hoping that I won't get blasted for this since it's been gone over many times, but I'm having trouble with diagnosing P0171 and P0174 codes. The first thing I did of course was reset the codes. The CEL stayed off for a few days then came right back with the same codes... I'm not really having a lot of trouble with power, although it did stall on a hard turn in a parking lot a week or two ago. So far I've checked the voltages on the MAF sensor and cleaned it, sprayed starter fluid around the intake hose (including the one from the oil fill tube), all of the vacuum lines, around the intake and plenum (yes, the seam, too), TB, IACV, EGR (basically anything with a vacuum line attached to it), and tested the fuel pressure. I can't figure out what's causing the lean codes. The only other thing I can think of would be an O2 sensor. I don't have an OBDII scanner with live data, so I'm thinking of running a couple of test leads through the bay up to the top to check the voltages while it's running. Other than that, I'm at a loss. Any suggestions?!
Another note: I did mistakenly clean the MAF using brake cleaner and some q-tips 2 or 3 weeks before the codes came up at the advice of a shop mechanic; however, my voltages are reading spot on so the MAF must still be functioning properly, right?
Another note: I did mistakenly clean the MAF using brake cleaner and some q-tips 2 or 3 weeks before the codes came up at the advice of a shop mechanic; however, my voltages are reading spot on so the MAF must still be functioning properly, right?