Spitfire1975
Well-Known Member
- Joined
- Nov 19, 2009
- Messages
- 1,720
- Reaction score
- 16
- Location
- Oregon
- Vehicle Year
- 1986
- Make / Model
- Ford
- Engine Size
- 2.9
- Transmission
- Manual
I have a 2.9 That overall runs very well. I have a problem where the engine will misfire(?), usually in 3rd or 4th gear while under heavy load (quick acceleration or towing). It will do it only once or twice, but consistently. Pulled codes and only getting a 31. Replaced EGR and EGR Position sensor and cleaned the Plenum real well. Replaced ALL gaskets. TPS is set correctly. IAC is good. O2 Sensor seems good. Still getting a 31 code. May have a bad connection in key ignition and have not completed a full tuneup (cap, wires, plugs, etc...). Fuel Pressure hangs right around 33 lbs. Fuel Filter was changed 5,000 miles ago. Can't find any vacuum leaks....Anybody have any ideas as to where I should go from here? Obviously I need to complete the tuneup......Thanks in advance...