2006 Expedition XLT
5.4 3V Triton
I have tried searching for this same problems and have found some similar issues, but have tried the fixes. I am hoping someone will throw an idea that might work.
The EXPO needed plugs change so I changed them with some struggles, but finished and cleared misfire issues. After that still ran sluggish and eventually threw a lean code on bank 1 which came after 1 day. Then I changed the fuel filter and relieved fuel pressure by pulling pump fuse. No luck so far. I swapped all plugs and coils from one side of engine to the other with no luck.
Listened with stethoscope and can hear diode clicking consistently in fuel injector(not sure if it could still be dirty or not).
I have read it could be vacuum leak, but cannot find one. I have also read it could be CAT but there was no issue with that before I started. The only other thing I could think is head gasket....(hope not). . Also I have cleared the computer after each thing I have done.
Any help or ideas are appreciated.
SYMPTOMS:
What I have done:
ENGINE CODES I HAVE RECEIVED:
RIGHT NOW NO CODES ARE FOUND BUT SOMETHING STILL WRONG
5.4 3V Triton
I have tried searching for this same problems and have found some similar issues, but have tried the fixes. I am hoping someone will throw an idea that might work.
The EXPO needed plugs change so I changed them with some struggles, but finished and cleared misfire issues. After that still ran sluggish and eventually threw a lean code on bank 1 which came after 1 day. Then I changed the fuel filter and relieved fuel pressure by pulling pump fuse. No luck so far. I swapped all plugs and coils from one side of engine to the other with no luck.
Listened with stethoscope and can hear diode clicking consistently in fuel injector(not sure if it could still be dirty or not).
I have read it could be vacuum leak, but cannot find one. I have also read it could be CAT but there was no issue with that before I started. The only other thing I could think is head gasket....(hope not). . Also I have cleared the computer after each thing I have done.
Any help or ideas are appreciated.
SYMPTOMS:
- Power loss up hills.
- Acceleration loss
- Highway speed bottoms out at 45 mph or so.
- jumpy while idling in Drive
What I have done:
- Cleaned mass air flow sensor
- Changed plugs (which cylinder 8 plug broke...that was fun)
- replace coil boots.
- changed fuel filter
- ran fuel cleaner through fuel system
- Swaped plugs and coils from one side of the engine to the other
ENGINE CODES I HAVE RECEIVED:
RIGHT NOW NO CODES ARE FOUND BUT SOMETHING STILL WRONG
- Other cylinder misfires which cleared during plug change
- bank 1 to lean ( most consistent)
- bank 2 to rich
- cylinder 6 misfire