maelstromracing
New Member
- Joined
- February 18, 2004
- Messages
- 2
- Reaction score
- 0
- City, State
- Rowlett TX
- Year, Model & Trim Level
- 1992 XLT
It's a friend of mine's Explorer that I need help on. It's 99 4.0 SOCH. I am getting 4 codes (Didn't pass emissions)
P0174 System Too Lean Bank 2
P0171 System Too Lean Bank 1
P0300 Random Multiple Cylinder Misfire Detected
P0420 Catalyst System Effieciency Below Threshold Bank 1
Any ideas where to start? I am thinking it is running lean from a messed up 02 sensor, clogged fuel filter or injectors or fuel pump not giving a lot of pressure or possibly a vacumm leak. Car runs like crap when it is cold out until it warms up. Air Cleaner is new. I haven't check the plugs yet. Thanks!!!
Lee
P0174 System Too Lean Bank 2
P0171 System Too Lean Bank 1
P0300 Random Multiple Cylinder Misfire Detected
P0420 Catalyst System Effieciency Below Threshold Bank 1
Any ideas where to start? I am thinking it is running lean from a messed up 02 sensor, clogged fuel filter or injectors or fuel pump not giving a lot of pressure or possibly a vacumm leak. Car runs like crap when it is cold out until it warms up. Air Cleaner is new. I haven't check the plugs yet. Thanks!!!
Lee