brianpitera
New Member
- Joined
- Sep 5, 2017
- Messages
- 7
- Reaction score
- 0
- Points
- 0
- Vehicle Year
- 1999
- Make / Model
- Ford
- Engine Size
- 3.0
- Transmission
- Automatic
Hello,
I recently purchased a 99 Ranger 3.0 Flex Fuel with about 184,000 miles. When I purchased it it had a fairly bad misfire on cylinder, it was noticeable at idle and driving. I have since replace the plugs and wires, ignition coil and the injector on cylinder 3, all helped a little and the cylinder 3 misfire code has disappeared, but P0171 and P0174 for banks 1 and 2 too lean have started to pop up. I most recently replaced the upper and lower intake manifold gaskets which has substantially helped smooth out the engine and driving it is very smooth and the idle is also fairly smooth, definitely much better, but the lean codes are still coming back, although it takes much longer now. I have also replaced every vacuum line I can find, tried finding other vacuum leaks with carb cleaner with no luck and cleaned the maf sensor. Tonight I tested the DPFE, with no suction it showed about 1.7 volts and with suction about 5.2, and it held suction. It also has an exhaust leak on the y-shaped pipe with the cats on it, behind the cats, which I was planning on fixing at a later point. Any help or advice on this is greatly appreciated, thank you.
I recently purchased a 99 Ranger 3.0 Flex Fuel with about 184,000 miles. When I purchased it it had a fairly bad misfire on cylinder, it was noticeable at idle and driving. I have since replace the plugs and wires, ignition coil and the injector on cylinder 3, all helped a little and the cylinder 3 misfire code has disappeared, but P0171 and P0174 for banks 1 and 2 too lean have started to pop up. I most recently replaced the upper and lower intake manifold gaskets which has substantially helped smooth out the engine and driving it is very smooth and the idle is also fairly smooth, definitely much better, but the lean codes are still coming back, although it takes much longer now. I have also replaced every vacuum line I can find, tried finding other vacuum leaks with carb cleaner with no luck and cleaned the maf sensor. Tonight I tested the DPFE, with no suction it showed about 1.7 volts and with suction about 5.2, and it held suction. It also has an exhaust leak on the y-shaped pipe with the cats on it, behind the cats, which I was planning on fixing at a later point. Any help or advice on this is greatly appreciated, thank you.