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


Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 12-24-2014, 04:09 AM   #1
Junior Member
 
Join Date: Dec 2014
Posts: 1
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default 2010 5.4L Issues after spark plug change.

I have a 2010 F150 5.4L with 200,000 miles. Almost all HWY.




I noticed the truck had a bit of a rough idle, so I figured it was time for new plugs....this would be my second set. No codes thrown.




So I go to Ford dealer and have the plugs done. The Service Advisor tells me that they made a mistake and put my new plugs into the wrong truck..that didn't need plugs...but they could take them out and put them into my truck. I figured it would be ok since they were only in the other F150 for as long as they figured out it was the wrong truck...so no harm..


Well....this is going to sound ridiculous, but my truck is all kinds of screwed up now.


I had to drive about 300miles the next day and I noticed these issues AFTER the change.


1) Gas pedal is stiffer than it was. Takes more pedal to maintain HWY speed and truck has a hard time cruising over 60mph...I'm having to push a lot more to get her to run faster. Acceleration is worse and there is a power gap and bogging feeling from 20 -50mph.


2) The brake pedal is stiffer as well. The pedal feels closer to me than before and takes extra effort to get truck to stop. Why this is happening I have no idea. At lights I have to push harder to keep the truck stopped...


Combine these two and the truck is radically different to drive than before. It feels like there is this restrictive pressure building up that is keeping the truck from both running and stopping....


I took it back to the dealership and they have no other answers except that this is truck with 200.000 miles on it and they maybe I should have the fuel injectors cleaned. I compromised and had the throttle body cleaned, but that hasn't helped.


I need my truck to run the way it did before this spark plug debacle...I plan on a new F150 in about 6months, so I'm hoping this can be resolved..


Any help is appreciated!


Thanks.

Last edited by Fleetlord; 12-24-2014 at 04:23 AM.
Fleetlord is offline   Reply With Quote
Old 12-24-2014, 01:44 PM   #2
Senior Member
 
ji603's Avatar
 
Join Date: Feb 2010
Location: AZ
Posts: 677
Mentioned: 0 Post(s)
Thanked 123 Times in 68 Posts
Feedback Score: 0 reviews
Default

Sounds like the wrong plug or too large of a gap. Have you pulled one of the easier ones to get to and looked at it?
ji603 is offline   Reply With Quote
Old 12-24-2014, 01:44 PM
 
 
 
Reply


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 06:21 AM.


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