Missing?
Thread Starter
|
Tuned
Joined: Aug 2003
Posts: 278
Likes: 0
Missing?
99F250 Super Duty with 350k on it. After about 10 minutes of running it starts running very rough like it is missing (injector issue ?). It shifts hard from 2nd to 3rd and steering wheel picks up a solid vibration.
Replaced the fuel sensor and associated wiring on a suggestion from some one (not on FTE) but that did not help
Replaced the fuel sensor and associated wiring on a suggestion from some one (not on FTE) but that did not help
Laughing Gas
Joined: Nov 2020
Posts: 988
Likes: 364
From: Republic of Texas
Get FORScan and the OBD II they tell you to get..
Learn to use it.
Pull all the codes and record them, clear all the codes, pull all the codes again and share both results.
Run every test FORScan has... share the results.
All sensors and control items must be OEM from the Ford or International counter guy... Riffraff Diesel, CNC Fab, and Diesel O Rings are proven internet sources.. never anywhere else.
Explain this fuel sensor???????? No idea what you speak of.
Learn to use it.
Pull all the codes and record them, clear all the codes, pull all the codes again and share both results.
Run every test FORScan has... share the results.
All sensors and control items must be OEM from the Ford or International counter guy... Riffraff Diesel, CNC Fab, and Diesel O Rings are proven internet sources.. never anywhere else.
Explain this fuel sensor???????? No idea what you speak of.
Mountain Pass
Joined: Apr 2024
Posts: 219
Likes: 84
Is it throwing an CEL or engine/trans code? That's a good place to start. Seems to me you might have at least a couple things going on. Couple of questions:
- When was the fuel filter changed and the fuel bowl cleaned? The filer quality is very important here. The Motorcraft unit has a hydrophobic barrier that helps keep water out of the injectors.
- Trans fluid condition? Service?
- The frontend aligned? Tire issues? Strange tread wear? I think this is most likely unrelated to the miss and trans issue.
- When was the fuel filter changed and the fuel bowl cleaned? The filer quality is very important here. The Motorcraft unit has a hydrophobic barrier that helps keep water out of the injectors.
- Trans fluid condition? Service?
- The frontend aligned? Tire issues? Strange tread wear? I think this is most likely unrelated to the miss and trans issue.
Thread Starter
|
Tuned
Joined: Aug 2003
Posts: 278
Likes: 0
I had the codes pulled and was told the codes were aboout the fuel sensor, its wiring, or possible oil in the wiring jacket under the valve cover. Was also told that inspection of the fuel semsor wiring showed it was varry frayed. So had both sensor and wiring replaced.
Thread Starter
|
Tuned
Joined: Aug 2003
Posts: 278
Likes: 0
Trans was rebuilt 3yrs ago at around 300k miles. I have all fluids such as trans, differentials etc when I have oil changed every 4k miles. It always looks ok.
I will defiantely check the fuel bowl and potential water issues.
I will defiantely check the fuel bowl and potential water issues.
Laughing Gas
Joined: Nov 2020
Posts: 988
Likes: 364
From: Republic of Texas
Trending Topics
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,695
Likes: 2,616
From: SE Florida
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Thread
Thread Starter
Forum
Replies
Last Post
MDSuperDuty
Modular V8 (4.6L, 5.4L)
1
Feb 16, 2011 09:51 AM
bigchucker
General Diesel Discussion
2
Oct 21, 2008 06:25 PM