Five problems related to ignition have been reported for the 1998 Ford F-150. The most recently reported issues are listed below.
My 1998 f150, for no apparent reason, the dome and box light would remain on after removing the ignition key. By researching on the net, I found the cure. Apparently the magnetic contacts in the door posts were dirty and would not function. Using windex which removed the wax and dirt, corrected the problem. Hope this helps others.
I changed my spark plugs at the recommended mileage and since that time they do not stay tight in the cylinders. They loosen up and I have to re-tighten them everyday so that they do not blow out of my cylinder head.
I was driving down the road when I heard a big explosion from under my hood. I poped the hood and found that my #2 coil was blown out of the cylinder. After getting my 98 f150 home I found that the plug was blown out of the cylinder. I have not gotten the problem fixed as of yet but Ford says the only way to fix is a new head.
"blown spark plug" 1998 Ford f150 5. 4l engine. Dealer wants $3700 to repair something that should never have happened.
Twice in the past 6 months, I or my wife had the vehicle just turn off. When it shut off for my wife, it happened at 45mph. She lost pwr steering but was lucky in getting off to the side of the road. After 5 mins of trying to start the truck, it started and didn't happen again till August. It happened while I was driving.