peglomaniac
New Member
- Joined
- Jun 20, 2008
- Messages
- 14
- Reaction score
- 0
- Points
- 1
- Location
- Moose Jaw, Saskatchewan
- Vehicle Year
- 1998
- Make / Model
- Ford
- Engine Size
- 4L V6
- Transmission
- Automatic
My 1998 Ranger XLT 4L auto 4x4 with 140,000 miles has has a miss that has been barely perceptible for many months. Last week it became really bad, and the truck was very jerky. It seeed to struggle reaching highway speed, but did eventually.
The miss was very intermittent, it would appear at all speeds, but worse under load, or decelerating.
I changed the fuel filter and added a can of Sea Foam to 1/2 a tank of gas and ran it 60 miles.
For part of the trip, about 15 miles, it ran pretty much properly at about 70 MPH, but when I started to play around with the speed, the problem came back.
My husband thought it was the #4 cylinder, so traded that spark plug and wire for a different one, and nothing changed.
He then tested the coil by pulling the plugs off, one by one, and when doing so on the passenger side it starts to run really rough, but removing the driver's side plugs, one at a time, really does not affect it and it runs fairly smoothly.
There is good hot spark jumping at least an inch from all 6 wires when they are pulled.
After that test, it is running super super rough, I would not even chance taking it on the highway. The only thing different from before the testing is he left the two spark plugs in the traded positions, he did not put them back where they were to start with, but the plug wires are back where they were before we started troubleshooting.
Any ideas as to what we should be looking for?
The miss was very intermittent, it would appear at all speeds, but worse under load, or decelerating.
I changed the fuel filter and added a can of Sea Foam to 1/2 a tank of gas and ran it 60 miles.
For part of the trip, about 15 miles, it ran pretty much properly at about 70 MPH, but when I started to play around with the speed, the problem came back.
My husband thought it was the #4 cylinder, so traded that spark plug and wire for a different one, and nothing changed.
He then tested the coil by pulling the plugs off, one by one, and when doing so on the passenger side it starts to run really rough, but removing the driver's side plugs, one at a time, really does not affect it and it runs fairly smoothly.
There is good hot spark jumping at least an inch from all 6 wires when they are pulled.
After that test, it is running super super rough, I would not even chance taking it on the highway. The only thing different from before the testing is he left the two spark plugs in the traded positions, he did not put them back where they were to start with, but the plug wires are back where they were before we started troubleshooting.
Any ideas as to what we should be looking for?