Need help with several engine codes on '94 4.0L
Hello everyone. I bought a '94 4x4 manual tranny Ranger several months ago pretty cheap because it had clutch problems and needed a new starter motor. I just recently finally got it on the road and it's check engine light comes on after about 5 miles of driving every time. I pulled the codes and the key on engine off test showed code 111 - System pass. But the key on engine on test showed several codes. They were:
176 - Lean bank 2 (something about heated oxy sensor)
172 - Lean bank 1 (something about heated oxy sensor)
136 - lean bank 2
48 - Vane AirFlow is high at idle or injector problem
32 - EGR open / erratic or valve position senson too low
Now before I start throwing money at this, I figured some of these are probably related and there is probably a logical order of things to check/clean/replace. I'd like to hear from anyone who has had these codes and what you had to do to fix it. Looking for expert advice.
I figure I'm probably needing some or all of the following new parts: oxy sensors, possibly a new mass air flow sensor, EGR valve, valve positioning sensor, catalytic converter, ??? I've only put about one tank of gas through it so far, and it doesn't seem to be getting very good mileage. I want to get this thing running good.
As an FYI, it has a 4" suspension lift, 3.73 gears, and I've swapped in a limited slip disk brake rearend from a '98 Explorer. I'm trying to fix this thing up really nice so I'm not afraid to put some money in it, but only if it's necessary.