Ten problems related to car stall have been reported for the 1998 Ford Expedition. The most recently reported issues are listed below.
#2 spark plug blew out of 5. 4l 2 v v8. Was on highway at time. Had to immediately pull over and disconnect fuel and spark for that cylinder. Was over 100km from home, couldnt afford to tow veicle so I had to drive it the remainder of the distance home. Inspected today, there is no threads left. Now need to drill and tap head, install helicoil/timesert and hope for the best.
#6 spark plug blew out of cyl head. Reinstalled and replaced coil since it broke mount. Put back in service and next plug in bank (#7) blew within 10 miles at approx same speed. When searching the internet this is a common problem with Fords modular engine prior to 04. When they make special tools and inserts to address the problem, Ford should pony up and have the inserts installed at least for the normal life expectancy of the engine.
3rd time we have had a spark plug ejection from the passenger engine head of our 1998 Ford Expedition with a triton 5. 4 litre engine. I owned a Ford f150 and had this same problem twice. I did research and called a few ase master mechanics that are rated as America's #1 and #4 mechanics in the nation, and was told it is the most common problem Fords triton engines have ever had, and they see these problems on a daily basis, yet Ford does not acknowledge the problem. Ford desperately needs to recall these engines, they are a hazard, and the spark plug ejects with explosive power damaging nearby components on it's way out of the engine. Ford refuses to acknowledge this common manufacture defect. To fix this problem new heads need to be installed on the engine. The quick helicoil style sleeve into the stripped spark plug threads has a failure rate of 100%. Again this is a major problem and the magnitude can be seen all over the internet by searching Fords spark plug blowouts. Literally 10's of thousands of forums, and insight in this problem is available online, except support from Ford motor company.
My 1998 Ford Expedition eddie bauer with 84k miles on it has had two spark plug coils go bad and have been replaced for $425 each time. On July 1, while driving on the highway, the car made a loud pop and we had to pull over, luckily without causing an accident. We were able to get to the Ford dealer in ojai, who looked at the car and determined that the a spark plug had blown out of the head and cost to repair was going to be $3800. Many people with the 5. 4l triton engine report the same problem and Ford needs to address this. The engine should be recalled since it has a fatal deisgn flaw. There are only 4 threads in each spark plug hole instead of 8. We could have been killed if the car had stalled at the wrong time. Please get Ford to address this problem.
While driving 50 mph the vehicle stalled. The driver pulled over onto the shoulder and attempted to restart the vehicle but it wouldn't turn over. The vehicle was towed to the dealership but the mechanic could not duplicate the problem.
While traveling on highway vehicle stalls. Dealership is aware of problem.
While driving,the vehicle is stalling, once it stalled while making a right hand turn.
While driving the vehicle stalls. The dealer has not been able to duplicate the problem.
While driving the vehicle stalls at any speed. The dealer is aware of the problem. Dealer not able to solve the problem.
Vehicle stalls when leaving stop light or stop sign. Very dangerious problem as vehicle stalls in front of on comming traffic, that either has to panic brake or swerve to avoid striking the stalled vehicle.