Excursion problem help needed (Accelerator pedal issues)
Thread Starter
|
6th Gear
Joined: Dec 2004
Posts: 6
Likes: 0
Excursion problem help needed (Accelerator pedal issues)
Im having some serious problems with my Exc. Thought I had it fixed. Then it started again yesterday. I can press the gas pedal to take off at a light about a inch or so and the truck takes off like im pressing it to the floor.But im not moving my foot. And going down the road it will cut off and right back on and not a lot of power. Then it may not do this for 3 or 4 days. I just had a new brain box put in. I changed the fuel filter. I changed the pressure reg. behind the pump. After the brain box it did great for 5 days. Then here we go again. I have a big trip in two weeks and got to get it repaird. Thanks for help you can give.
Jack in Ga.
Jack in Ga.
Post Fiend
Joined: Feb 2011
Posts: 26,410
Likes: 6
From: Ft. Lauderdale, FL
Super Moderator
Joined: May 2004
Posts: 29,380
Likes: 118
From: Central Coast of CA
Trending Topics
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
It sounds like a loose ground to the TPS, but that's not to say this is what's happening. You can try a new TPS, but that's an expensive experiment... like the new PCM was.
You can...
This has a history of "cleaning the age" out of the TPS and it may or may not fix the issue... but it's almost no cost. Ideally, you would have a scan tool that shows your TPS voltage (plus a few other key PIDs) and you can log while driving. If something happens in the future, the log would show what was going on when it happened. If you already have a scan tool, you can look at the TPS output and exercise it before you clean it... so you can get a Before and After reading.
You can...
- Remove the TPS.
- Spray the connections and the throttle with electric contact cleaner (available at any auto parts store).
- Exercise the TPS with the cleaner in there.
- Apply a light coating of dielectric grease to the connector before installing.
This has a history of "cleaning the age" out of the TPS and it may or may not fix the issue... but it's almost no cost. Ideally, you would have a scan tool that shows your TPS voltage (plus a few other key PIDs) and you can log while driving. If something happens in the future, the log would show what was going on when it happened. If you already have a scan tool, you can look at the TPS output and exercise it before you clean it... so you can get a Before and After reading.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Fleet Mechanic
Joined: Aug 2010
Posts: 1,461
Likes: 158
From: Sedalia, CO
Rich's suggestion to use a scan tool, or perhaps even Torque, to check the TPS voltage is a good one. However, there were enough issues with the 2001-2003 TPS' that I'd be tempted to replace it. On these trucks, that means replacing the entire pedal assembly. I had similar issues on my '01 X and the replacement fixed the problem for $81. That was in 2003, though, and I don't know what the current price is.
Mark
Mark
Post Fiend
Joined: Dec 2009
Posts: 15,505
Likes: 18
From: Livoina,La
If you don't have a scan tool you can check tps voltage with a volt meter.
Ground to battery
Hot to middle wire on tps plug.
Key on engine off. Slowly push the pedal and watch the voltage for dead spots
Idle should be around 1.5v and WOT no more than 4.5v
Ground to battery
Hot to middle wire on tps plug.
Key on engine off. Slowly push the pedal and watch the voltage for dead spots
Idle should be around 1.5v and WOT no more than 4.5v
Thread
Thread Starter
Forum
Replies
Last Post
crapshootersteve
1999 - 2003 7.3L Power Stroke Diesel
23
Apr 13, 2012 02:29 PM