Strange running behavior
Thread Starter
|
New User
Joined: Dec 2011
Posts: 12
Likes: 0
Strange running behavior
I have a 2008 F-150 V8 5.4 flex with 105k miles and I bought it used not long ago. I've noticed slightly one other time in lower speeds that sometimes behaves strangely when coasting and then applying the gas pedal. Well, today on the highway I was coasting as I was catching up to traffic and it did it much more distinctly and slightly jerky but it only lasted for a few seconds and didn't do it again. I'm looking for ideas on what this might be. Thanks.
Postmaster
Joined: Jul 2010
Posts: 3,743
Likes: 2
From: Henrico, VA
I have a similar issue with my truck and the jerking but mine is the reverse it happens when I get on the gas to get up to speed. Mine issue is a random miss so I plan to change out plugs before too long just need the free time to do it.
Do you have any more history behind the truck that might help us some?
Do you have any more history behind the truck that might help us some?
Postmaster
Joined: Jul 2010
Posts: 3,743
Likes: 2
From: Henrico, VA
Well I can not say for sure but it sounds similar to my problem. You might have a code in your computer and just didn't notice the flashing CEL. You might want to check that out and see if you have anything.
Thread Starter
|
New User
Joined: Dec 2011
Posts: 12
Likes: 0
Trending Topics
Postmaster
Joined: Jul 2010
Posts: 3,743
Likes: 2
From: Henrico, VA
Well the plugs are another issue all together. they can be done but be prepared to spend a few hours doing it they are not much fun. You will need a special tool called a Lisle tool just in case the plugs break off which most do. To get the back ones pulling the computer is recommend to make it easier. I would also run some sea foam through the motor one or two times before trying to remove them to help loose the carbon build up some. I also recommend using only Motorcraft plugs to go back with as many people have had issues with other plugs in these engines. Also do forget the anti seize on the plugs to keep them from breaking the second time they are changed.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
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
Postmaster
Joined: Jul 2010
Posts: 3,743
Likes: 2
From: Henrico, VA
You know I just thought about something. Its possible that the previous owner changed the plugs out and broke one so he left it in the truck rather then getting it out and that could be causing your issue. But that i think would throw a code fairly quickly but its still possibly.
Thread Starter
|
New User
Joined: Dec 2011
Posts: 12
Likes: 0
Sounds like fun. I found another thread that sounds alot like what mine is doing. Guess I need to replace the plugs.
2005 5.4 XLT - engine rough/jerking between 40-60mph - Ford F150 Forum
2005 5.4 XLT - engine rough/jerking between 40-60mph - Ford F150 Forum
Thread
Thread Starter
Forum
Replies
Last Post