NEED HELP TRACKING DOWN ENGINE CODES

  • Tiny
  • chogidog
  • 1996 Ford Explorer
  • 6 CYL
  • 4WD
  • automatic
  • 198,000 miles

I have a 96 explorer with a 4.0l 4x4. I've been replacing a lot of parts to pass our state inspection and unfortunately, more problems have been creeping in as I fix others. I started with P0401, p0305, p0171 and sometimes p0113 and p0174. I replaced the plugs and wires, the DPFE sensor, cleaned the MAF, replaced the vacuum lines to the DPFE sensor due to some cracking and installed a wire tie on the IAT connection because the clip had broken off and replaced the fuel filter. At the same time I installed new inner tie rods and upper control arm on the passenger side and shackles on the leaf springs. I cleared the codes and took it for a test drive of about a half mile, when I returned and parked in the driveway, the water pump started leaking. I replaced the pump, topped off the coolant and warmed it up with no issues. Took it for a 45 min drive to return the fan clutch tool and a p0171 showed up, but ran fine otherwise. When my girlfriend took it to work, it started misfiring and blowing smoke. It now has codes p0304 p0305 p0306 p0171 and p0174. I know what obd2 says they mean, misfires on 4 5 & 6 and lean on banks 1 & 2. But does anyone know where I can start to fix them?
When I got to her work to take a look, I didn't see anything obviously disconnected like vacuum lines or plug wires. The alternator seems to a little noisier than I recall from earlier today and there's a puf-puf-puf (best imitation of a exhaust? Leak) coming from the passenger side.

Saturday, April 23rd, 2011 AT 11:08 PM

1 Answer

  • Tiny
  • rasmataz
  • Member

Lean fuel condition could be caused by one of the following below: 1. Vacuum leaks
2. EGR and PCV valve.
3. Low fuel pressure.
4. Dirty fuel injectors.
5. Mass Air Flow Sensor.
6. Oxygen Sensor.

Was this
answer
helpful?
Yes
No
Saturday, April 23rd, 2011 AT 11:27 PM

Please login or register to post a reply.

Similar Questions