Five problems related to engine cooling system have been reported for the 1998 Ford Expedition. The most recently reported issues are listed below.
Number #4 coil pack, once air condition is turned on dripping water from lines into spark plug area, the #4 coil pack will through a code for a miss-fire. I have replaced the coil packs through out the entire engine recently again. I ran the air conditioning for about one hour and the next day I started the vehicle up and it had a rough idle. I drove approximately 6 miles when the check engine light came on. I hooked up my obd2 to see the problem found out the new #4 coil had misfired once again. I had the single coil pack replaced with 45,000 the first time then I replaced them all at 135,000. And now I had to replace the #4 coil pack again by itself at 143,000. It only throws a mis-fire once I have the air condition on.
The vehicle experienced a coolant leak.
Constantly brought to dealership who continually says nothing is wrong with vehicle. No safety defect listed within summary.
Steering has play and dealer has tried to fix three times. Steering has feeling of no control. Cooling system needed one gallon of coolant five days after taking ownership on 3/26/99. Vehicle was a demo model and was still considered new even though it was a 1998 model.
The engine loses coolant with no visible signs of leak found, the steering pulls to right and is loose, feels like you can easily loose control. Drove other new vehicle and did not have this problem, similar to odi id# 702318.