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'05 F150 overdrive shifting problem

 
  #31  
Old 02-27-2019, 10:26 AM
dogdays
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Well, my local OReilly's did.

I've taken a vehicle to my local OReilly Auto Parts and had it scanned, once by an older guy and once by a middle aged Navajo woman. Both times the scan worked properly. One of the scans uncovered a misfire on one cylinder. The scanner output included which cylinder was misfiring. I don't trust chain auto part store employees, but IMHO using a scan tool is dead simple.

R.
 
  #32  
Old 02-27-2019, 12:50 PM
pdqford
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Is it low on transmission fluid? (Easy stuff first ;-)
 
  #33  
Old 02-27-2019, 01:31 PM
redfishtd
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Take your android phone and download $5 dollar torque pro app , buy a cheap amazon blue tooth reader . Look under test results and it will tell you the raw computer counts loading up on each cyl towards setting a cel . Fords threshold is set high to stop being a nuisance . Torque pro is a really awesome tool you will be amazed . Plugs are only good for 60k and must be done right . It shows up first in higher gears at low engine rpms . Like climbing a hill, it is lugging so the misfires show up.
Ideally no counts should show up and is achievable if plugs /boots done right . It helps if you clean out sparkplug tip area in cyl to get that plug breaking carbon out of there . That carbon breaks plugs going in and out . Carb cleaner helps dissolve it ,do a good job and replace all boots .Do a hosp clean plug job . Clean all cop connectors . Use a small amount of dielectric grease on boot ends only . If oil and antifreeze getting on boot s or in sparkwell something is wrong . If you clean this engine you better protect and clean all that water out not something you should do unless you really know your stuff .
You can't diagnose this engine until plug job is good , people have changed out transmissions many times just because of misfires .$2500 job all because of misfires .
 
  #34  
Old 02-27-2019, 04:20 PM
CathedralCub
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Originally Posted by dastreet View Post
I have an 05 F-150 Lariat, 158,000 miles on it. I had the same shifting issues as all of you, but as of yesterday my truck will not even shift into gear above 30 MPH in Overdrive. If I press the gas hard from a stop it will shoot into the next gear, but as soon as I let off it goes right back down. If I try to gain speed the RPM's just rev high and I get no more speed.

I will say up front that I am not mechanically inclined enough to test this myself. I gather from reading that my first issue's MAY be the spark plugs and coils, any ideas about why my truck wont even shift now?
Sounds like a completely different issue than the one this thread is discussing. It might have the same issue also, but the bigger issue (not shift into gear above 30MPH etc.) is different. You might want to start a separate thread so your issue gets the proper attention, and in the meantime I'd suggest checking your fluid level in the transmission.
 
 
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