Fixed!
Replaced the bad coil and the motor runs smooth. Cats cleaned up with a 10 mile cruise on the freeway.
No more stumble, no sluggish acceleration. My MPG has never been better.
Fixed !
I am one happy camper.
One new coil, 10 miles of driving to clear out the cats.
All 8 cylinders firing, motor is smooth, no stumble, mpg up like i’ve Never seen before. Saturday morning i’ll Disconnect the batter and short the cables with a cold motor, then start and idle for 20...
Update:
Mine is not the throttle body.
New plugs and boots helped significantly as four plugs had been only finger tight, no more exhaust leak sounds.
The FORScan software picked up a misfire on 3 so I moved the coil to 5, ordered new coil as the misfire moved from 3 to 5 - while...
Two things to consider:
A) every ford Truck I have owned represents an average on the fuel gage, so if you will with the key on then it will take a long time before it rises to a true level.
B) the Expeditions have an electrical connector on the gram underneath the drivers door, failure or...
If you can check fuel rail pressure, of not consider replacing the fuel pump driver module which is located on the frame rail just above the spare tire. There won’t be any codes.
The best part of this, $600 for the 20” wheels and tires with less than 500 miles, new sensors $60, balancing and disposal of the original 17” was $48.
Ride is fantastic at 50psi. No noticeable impact to braking.
Update:
A subtle stumble is still present in my Expedition when the rpms are low and the Trans is in O/D. Acceleration is significantly improved, responsiveness to the go pedal is fantastic.
Either the TB or the relearn process or the combination of the two are responsible for the...
You could test fuel pressure or replace driver module :
https://www.amazon.com/dp/B005JJ0D22/?coliid=I1N9II51BCTJ7G&colid=3G9VBEU8RC30F&psc=0&ref_=lv_ov_lig_dp_it
It worked.
- no more stumble at throttle tip in
- motor is far more response with freeway on ramps, as in more power to get the job done
Make certain that you disconnect the battery, reconnect, turn key on and watch dash light calm themselves, then start and let it idle for 15 to 20 minutes as...
I have this same symptoms on my truck with 230k and i’ll Know for certain if my own diagnosis is correct.
The throttle body is electronically controlled with a motor gear to a gear on the throttle body butterfly, non-serviceable so you have to replace the entire throttle body. As the truck has...
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