Go Back   Ford F150 Forum - Community of Ford Truck Fans > Late Model F150s > 2004 - 2008 Ford F150
Sign in using an external account
Register Forgot Password?


Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 01-15-2012, 09:57 PM   #1
Junior Member
 
Join Date: May 2011
Posts: 4
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Angry 2006 f150 5.4 truck bucking

I have a 2006 ford F150 FX4 5.4 and I am having a problem with the truck bucking on me, it only happens when I am going about 45 mph or so and 11 to 1200 rpms, or if I am coasting along and go and hit the gas lightly it starts to buck, but as soon as I give it gas it does not do it. Here are the parts I have changed recently, Fuel pump, Fuel pump control module, Fuel filter, throttle positioner, and started to change coil over plugs (cop) done 2 so far, I am not getting any check engine light at all, and hooked up computer and no codes found and no misfires, this is driving me nuts, does anyone have any ideas or ever seen this. Thanks.
paul012597 is offline   Reply With Quote
Old 01-15-2012, 10:17 PM   #2
Junior Member
 
Join Date: Jan 2012
Location: rock tavern
Posts: 10
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Lightbulb bucking!!!!!

im having the same problem with my 07 5.4l. luckily im under warrenty still. i got about 82,000 miles on mine and it does the same excact thing you are talking about. took it in once and they replaced the cat. and the o2 sensors. started doing it again and now i gotta bring it back into ford. i cant stand it, its very annoying. once i bring mine to the delar and they tell me what it is i will let you know what they say and also ill have part numbers if you need.
Mikethomas is offline   Reply With Quote
Old 01-15-2012, 10:18 PM   #3
Senior Member
 
Join Date: Jul 2011
Posts: 308
Mentioned: 0 Post(s)
Thanks: 0
Thanked 17 Times in 17 Posts
Feedback Score: 0 reviews
Default

Symptoms are screaming fuel pump delivery module (FPDM), but I believe you mentioned you replaced it. I would double check the connections and condition there first, as that's one of the first things that will happen when it goes.
lariatboy is offline   Reply With Quote
Old 01-15-2012, 11:30 PM   #4
Junior Member
 
Join Date: Jan 2012
Posts: 1
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

Had the same problem with my truck bucking at 45mph for the last 3-4 months. I asked around and figured out that it was the Spark Plugs. My truck is a 2006 5.4L with 89,000 miles. My girlfriends dad changed them for me, and it fixed the problem. He had to buy a special tool to get them out because they are a 3 piece plug and they break off. It will cost a ton if ya take it to a dealer ship because there a pain in the *** to get out. But it definetly sounds like the plugs. hope this helps
Jlhornback is offline   Reply With Quote
Old 01-15-2012, 11:45 PM   #5
Senior Member
 
theduke308's Avatar
 
Join Date: Oct 2011
Location: WV
Posts: 236
Mentioned: 0 Post(s)
Thanks: 0
Thanked 12 Times in 6 Posts
Feedback Score: 0 reviews
Default

Mine did the same replaced all the plugs and cops and its all better now
__________________
2004 F150 XLT Ext Cab~~Stainless Brush Guard, Stainless Tail light Guards, Stainless Nerf Bars
theduke308 is offline   Reply With Quote
Old 01-15-2012, 11:58 PM   #6
Senior Member
 
Turkey Hunter's Avatar
 
Join Date: Jan 2010
Location: virginia
Posts: 1,559
Mentioned: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Default

Defintly either the plugs or a cop. Sounds like you have spent a lot of money trying fix this problem.
__________________
2004 F150 XLT 5.4 4x4 3:55-Edge Evolution-Flowmaster 40 series si/do-K and N drop in airfilter-Gotts Mod-Kobalt Toolbox-Auto spring 2 inch leveling kit
Turkey Hunter is offline   Reply With Quote
Old 01-16-2012, 12:26 AM   #7
WDE
 
04_lariat_4x4's Avatar
 
Join Date: Sep 2011
Posts: 2,115
Mentioned: 1 Post(s)
Thanked 18 Times in 17 Posts
Feedback Score: 0 reviews
Default

its plugs. the key is its doing it at 45 mph, bingo. try doing 45 uphill with steady throttle... it'll buck like crazy.
__________________
04 Lariat SuperCab 4x4
04_lariat_4x4 is offline   Reply With Quote
Old 01-16-2012, 12:29 AM   #8
Senior Member
 
masitile's Avatar
 
Join Date: Dec 2011
Posts: 2,134
Mentioned: 5 Post(s)
Thanked 157 Times in 138 Posts
Feedback Score: 0 reviews
Default

Plugs and coils! Do them all. Spray pb blaster in the plugs a couple days before you do them. 100% the problem.

Last edited by masitile; 01-16-2012 at 12:33 AM.
masitile is online now   Reply With Quote
Old 01-16-2012, 12:33 AM   #9
WDE
 
04_lariat_4x4's Avatar
 
Join Date: Sep 2011
Posts: 2,115
Mentioned: 1 Post(s)
Thanked 18 Times in 17 Posts
Feedback Score: 0 reviews
Default

plugs aren't too bad but plugs and coils together is pretty expensive. take it to dealer service and they can scan to see if any coils are bad. if not you'll only have to replace the plugs and save alot of $$$. they'll need replacing eventually but its been about 8k miles since i replaced the plugs and no coil issues yet
__________________
04 Lariat SuperCab 4x4
04_lariat_4x4 is offline   Reply With Quote
Old 01-16-2012, 12:50 AM   #10
DFWFO
 
Join Date: Aug 2011
Location: Aledo, Texas
Posts: 34
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

Definitely spark plugs.. I just went through the same thing with my 06' 5.4 Triton. Maybe run a couple of carbon reducer mixes through your gas tank before you decide to change the plugs. I had no breaks out of 8... I was lucky.
Catahoula Lariat is offline   Reply With Quote
Old 01-16-2012, 12:50 AM
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
truck sputtering and bucking when excellerating viper801 2004 - 2008 Ford F150 7 02-20-2012 01:55 PM
Leak under truck 2006 f150 6cyl floorlayer 2004 - 2008 Ford F150 0 12-12-2011 11:11 PM
2006 screw lariat..bucking codes:P0302,P211&P2104 gsantane Maintenance Shop 2 04-06-2011 09:27 AM
Radio turn off and on again when start truck (2006 F150 xlt) San_Fco 2004 - 2008 Ford F150 7 03-24-2011 09:19 AM
Truck was bucking and not running smooth at all csx5197 2004 - 2008 Ford F150 9 07-08-2010 10:24 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Join F150 Forum

 

The Mustang Source
All times are GMT -4. The time now is 09:56 PM.


Copyright 2006 - 20011 F150forum.com
This site is in no way affiliated with the Ford Motor Company.