I have a 2003 excursion 6.0 diesel engine cuts out at 60-70 mph
It happens more often when I'm pulling my 9000lbs travel trailer,at highway speeds,when I try to suddenly accelerate the engine cut's out until I release the gas pedal,brought it to gator ford and they knew nothing if the problem
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Re: I have a 2003 excursion 6.0 diesel engine cuts out at...
Whne I worked at Ford , they had problems with the accelerator pedat electronic switch. The pedal is not connected to the engine with a cable, but with an electrical connection. You would have to have a scanner put on your vehicles computer and check for any trouble codes. Also give the Ford dealer your VIN # and they can check for recalls for that problem.
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Any performance testing re auto A/C requires consistant engine revs highway revs eg 1800 exit ramp eg idle stop start 800revs leading to much reduced A/C compressor speed and therefore performance output .Also all testing its desirable to close the bonnet to control design air flow through the engine bay .Also check under dash passenger side air flow pos a filter on return air duct or something sucked up into paper etc .good luck!
Over Drive..... Generally speaking, overdrive (OD) is the highest gear in the transmission. Overdrive allows the engine to operate at a lower rpm for a given road speed. This allows the vehicle to achieve better fuel efficiency, and often quieter operation on the highway. When it is switched on, an automatic transmission can shift into overdrive mode after a certain speed is reached (usually 70+ km/h [43+ mph] depending on the load). When it is off, the automatic transmission shifting is limited to the lower gears. For an automatic transmission, it is almost always best to select overdrive and allow the transmission to control engagement of the overdrive. (It may be necessary to switch it off if the vehicle is being operated in a mountainous area or when towing a trailer.) With a manual transmission, overdrive should usually be selected when the average speed is above 70 km/h (approx. 43 mph).
I would first check the u-joints on the driveshaft if the problem only happens when the speed is between 62-75mph. Then check all the tires for lumps or bulgesin the sidewall or tread surface. The tires may also be out of balance and bouncing at that speed. If the vibration occurs only when the engine is around 2000rpm, check the pulleys, serpentine belt and anything driven by it for looseness. Also, check the trans mount to see if it is loose or broken. If everything checks out ok, have the OBD codes checked to see if anything might be causing the engine to surge.
IS A GAS OR DIESEL? IT COULD BE A LOTS OF THINGS, POSSIBLY NEUTRAL SAFETY SWITCH, IT COULD BE AN IAC (IDLE CONTROL MODULE) MOTOR, & LOTS OF OTHER THINGS DEPENDING ON IF IT IS A GAS BURNER OR A DIESEL ENGINE.
a 7.3 with 97K miles is just getting started on it's lifespan. These motors will last for sometimes 300K miles with regular service. They do have a 100K powertrain warranty so you're close to out of warranty on this one. The transmissions and torque converters were sometimes weak, but if you treat them right, they'll last. Personally, I've got a ;'01 Limited since 2003 and I've got close to 180,000 miles on it... I've done regular service on it, brakes, changed the tranny out, have a banks kit on it, and it runs like there's no tomorrow. Great rig, highly recommend a diesel. Even tho ford isn't making the Excursion any more, the Super Duty is around to stay for a while so there'll always be service parts for the Excursion... Hope that helps in your decision... KEN