It's probably computer related, so it's too bad your co-pilot wasn't a trained monkey-wrencher who just happened to have a good quality scanner plugged in, flipping through various live stream data screens...he could have seen it happening and hit "freeze frame" function on the scanner. Then could retrieve that and see all processes like 30 seconds before, and 30 seconds after pressing the freeze frame button. Watching the action of all sensors and controlling switches that the computer controls or gets input from, might help to isolate the problem. In closing, and only partly in jest, don't let the boys at ford take you for a ride. Go hire an independent mechanic and take him for a ride.
SOURCE: 99 Ford F350 Powerstroke diesel; misfire code; loss of power
The first thing i would check is the Glow Plug Relay. Depending on your engine there should be (2 solenoids, or just one) sitting on the top front a little to the right of center. (right bank of engine that is) If you have 2 of them one should be smaller and it is the one furthest to the rear of the engine. It controls power to your glow plugs for cold start up. When you turn the key to the on position the 2 larger wires should both have power. When the ignition is off only one wire should have power. Check this if you do both these tests and only one wire has power with key on or off then you need to make sure that the key switch is sending power to the solenoid. Do this by checking the smaller wire with key off. It should not have power and then with key on it should have power. If this is good and test one is bad then the relay is bad. Note This is not true for the larger realy that sits furthest foward on the engine. The bigger one. This test will not work for it but it controls your intake heater. On another note: This is a timed circut and will "kick out" after about 1-2 minutes. In otherwords it does not stay on all the time that key switch is on it will for for about 1-2 minutes then shut off! Next would be your injectors are getting weak or bad and even your HPOP could be getting weak. or glow plugs in engine are out, In otherwords there are alot of possibilities causing your problems If you are getting a misfire code for your injectors then you may have some weak or inop injectors. Any way this will give you a pretty easy test for the most common failure which is the Glow plug relay. About 35-40 bucks at your local auto parts house.
SOURCE: Need a pic veiw of 2004 ford f350 6.0L diesel EGR
1st of all when Ford started out with putting "EGR's" on those diesel engines, they rushed it and are nothing less than a pain in the ***! i recommend having an EGR cleaning service performed by your local Ford dealer, i know they charge up the wazoo, but they're the best people to perform the service period.this is a VERY common problem with those engines and that service is "supposed" to be performed every 30K I believe. i dont recommend attempting to remove and service it youself, this WILL only make it worse.
Testimonial: "Im relieved to here that someone else is thinking the same thing. Im still going to try it myself as i am somewhat skilled at this but Thanks a bunch!"
SOURCE: 2002 ford f550 7.3 diesel. check engine light
2002 7.3, until Temp gauge reaches 1/4 warm, if driving the check engine light comes on, if I leave off throttle check engine light goes out, once engine is up to Temp all runs fine, motor only has 111,113 on it
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