motor3124
New Member
- Joined
- August 14, 2022
- Messages
- 3
- Reaction score
- 7
- City, State
- Phoenix
- Year, Model & Trim Level
- 2000 Explorer Eddie Bauer
I recently picked up a 2000 Explorer 4.0 SOHC with 123K miles, was an older mans truck that sat at the family vacation home. I did the usual maintenance including motorcraft plugs, wires as well as the upper & lower intake gaskets since the idle was low and had a vibration. This also fixed the 15-18 % high fuel trim on both banks. I put about 200 miles on it as a daily driver and as I pull in the driveway I get a rough idle / check engine light - P0303. Also bank 2 shows 25% fuel trim while bank 1 is normal???
Things I've tried so far with no change:
Swapped in one of the old plugs
Swapped in an old plug wire
Tried another coil pack I have laying around
Swapped upper and lower intakes with a spare set
Smoke tested for vacuum leaks
What do I check next???
Things I've tried so far with no change:
Swapped in one of the old plugs
Swapped in an old plug wire
Tried another coil pack I have laying around
Swapped upper and lower intakes with a spare set
Smoke tested for vacuum leaks
What do I check next???