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The wifes 04 EB Expedition just shuts down while driving at highway speeds. It has the 5.4 and the problem is intermintent and no engines codes. You have to pull over put it in park and it will restart . It will only restart in park I tryed in neuteral but it would not start. It may do this a few times a week. It has 105K on it.
I have had the same issue. When I bought the truck (99 Navigator ) it had a aftermarket sound system in it. I had the issue for about 2 weeks and then decided to change the system out to something more mild. I reran the the power line that was connected near the drivers side kick panel(aftermarket) and was fine. 2 weeks later I decided to run that line again and Bam it stalled on me again. I have since disconnected it and no issues. i called the transmission shop to ask them what the deal was and he told me it might be the ABS Switch on the rear axle or the connector has dirt in it to the transmission(wire harness). He told me to chech the harness and make sure its on tight and is all clean. Its exposed to the elements as well. i have also changed that and no issues at all. Try some of those suggestions and let me know what happens or if you find out what the issue is please post it and let me know what it was. Mind boggling isnt it.
You have to pull over put it in park and it will restart. It will only restart in park I tried in neutral but it would not start.
Hmm, maybe the range sensor down on the tranny is acting up. The clue is that you cannot start it when in neutral. I'm thinking that if the sensor is acting up and the ECM loses communication with it, the ECM shuts down the engine as a safety feature because it doesn't know which gear to put the tranny in. Just a thought!
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Hmm, maybe the range sensor down on the tranny is acting up. The clue is that you cannot start it when in neutral. I'm thinking that if the sensor is acting up and the ECM loses communication with it, the ECM shuts down the engine as a safety feature because it does know which gear to put the tranny in. Just a thought!
Thats exactly what I was having also. Just as you described .
When I had this problem it was on my 2003 navigator. It would stall at highway speeds except I could kick into neutral and turn key all the way off while coasting and restart, then shift back to drive. When it wouldn't restart in neutral I had to safely exit freeway or jump to emergency lane and restart with tranny in Park. In my case it was the relay issue in the GEM module (fuse box). The relay heats up due to bad connection and solder in fuse box on circuit board. The relay itself is the relay which controls PCM. (#41 I think). Dont rule this out as it was a known problem for year (2003)
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Had a (ford) mechanic tell me when a cylinder miss fires the PCM shuts the fuel down causing the engine to die. You can restart because the PCM is reset when you turn the key off and back on.
He said to replace the plugs and if it still does it replace every coil. He said coils start to break down after 65k??????? My 1999 F150 has 155K and the orginal coils.
It seems pretty unlikely that a misfire would cause the engine to shutdown without a code. When I had a coil go out it misfired, and gave a code, but continued to run until I replaced the coil. This advice seems like an expensive shotgun fix.
We had the same problem with our 05 Expedition. First there were no codes, then the service engine light came on so we took it to a garage they said it was #7 Spark Plug, so we changed the spark plugs...a spark plug broke. We were still driving it and then on the highway started losing power...at about 65 mph, stalled and pulled over to restart. We then parked the vehicle ordered a special tool to remove the broken spark plug thinking that it was the spark plug causing all this chaos, and a few days later tried restarting it-it wouldn't start. We then decided to take it back to the garage and had it towed. We found out it was a "smartbox". Replacement cost-$250, labor $250. I've been googling what the heck a smartbox is...can't find anything!!
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