Go Back   Ford Truck Enthusiasts Forums > Super Duty/Heavy Duty > Super Duty & Heavy Duty
Sign in using an external account
Register Forgot Password?


Super Duty & Heavy Duty 1999 to current Ford F250, F350, F450 and F550 Super Duty with diesel V8 and gas V8 and V10 engines SPONSORED BY:

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #1 (permalink)  
Old 06-17-2010, 05:05 PM
barry1me barry1me is offline
Senior User
 
Join Date: Oct 2005
Posts: 132
barry1me is starting off with a positive reputation.
2005 5.4l multiple misfire P0300 code

I have a 05 with 117k miles on it, and am getting a multiple misfire code. Truck runs good at idle and under normal acceleration. If you WOT throttle truck from a dead dig or from any speed it bucks and misses like crazy through the entire RPM range. Any idea what it could be? I have cleaned throttle body, new air filter, and fuel filter. Also have ran fuel cleaner through a few tanks and nothing has helped it. I was wondering if these trucks have a EGR valve on it?
__________________
10 FX4 SCREW
Reply With Quote
  #2 (permalink)  
Old 06-17-2010, 06:44 PM
Robs06SuperDuty's Avatar
Robs06SuperDuty Robs06SuperDuty is offline
Elder User
 
Join Date: Dec 2006
Location: Gettysburg, PA
Posts: 725
Robs06SuperDuty is gaining momentum as a positive member of FTE.Robs06SuperDuty is gaining momentum as a positive member of FTE.
@stemandbeans
prolly a coil or a coils are about due, along with spark plugs. I had my plugs changed at 60K and the gaps were worn the hell out! had to have one of my coils replaced around 57K cuz it took a dump.
__________________
Robby
06 F250 XLT 5.4L SCLB 4x4, "Hybrid", F350 Block Swap, Firestone Air Bags, Skyjacker 2.5" Coils, 295/70R18 Trail Grapplers, 08 Rear Diff Cover, 08 Tailgate, RC Dual Stabilizer, K&N CAI, Banks Monster Exhaust, SCT X3 with Custom Tunes from 5 Star, Cobra 29 with Wilson 1000 whip
Reply With Quote
  #3 (permalink)  
Old 06-17-2010, 08:51 PM
barry1me barry1me is offline
Senior User
 
Join Date: Oct 2005
Posts: 132
barry1me is starting off with a positive reputation.
Quote:
Originally Posted by Robs06SuperDuty View Post
prolly a coil or a coils are about due, along with spark plugs. I had my plugs changed at 60K and the gaps were worn the hell out! had to have one of my coils replaced around 57K cuz it took a dump.
I was thinking it could be some plugs but then from what I have heard if you had one or even three cylinders missing it would have shown up on the scanner. This showed a random multiple misfire code which lead me to think I have several cylinders missing.
__________________
10 FX4 SCREW
Reply With Quote
  #4 (permalink)  
Old 06-18-2010, 01:36 AM
redford's Avatar
redford redford is offline
Moderator
 
Join Date: Sep 2000
Location: Hooterville WI
Posts: 15,674
redford has a spectacular reputation.redford has a spectacular reputation.redford has a spectacular reputation.redford has a spectacular reputation.redford has a spectacular reputation.redford has a spectacular reputation.redford has a spectacular reputation.redford has a spectacular reputation.redford has a spectacular reputation.redford has a spectacular reputation.redford has a spectacular reputation.
Was the 100k tune up done on the engine? What brand of spark plug was used?
__________________

2007 F-250 Super Cab Short Bed 4x4 XLT Sport Package 5.4L 3.73LS Tow Command

Stuart
Retired Master Sergeant

FTE Guidelines
Reply With Quote
  #5 (permalink)  
Old 06-18-2010, 05:27 AM
barry1me barry1me is offline
Senior User
 
Join Date: Oct 2005
Posts: 132
barry1me is starting off with a positive reputation.
Quote:
Originally Posted by redford View Post
Was the 100k tune up done on the engine? What brand of spark plug was used?
i bought the truck used, and I dont know if it has had new plugs yet.
__________________
10 FX4 SCREW
Reply With Quote
  #6 (permalink)  
Old 06-19-2010, 09:53 PM
barry1me barry1me is offline
Senior User
 
Join Date: Oct 2005
Posts: 132
barry1me is starting off with a positive reputation.
do these motors have an EGR valve?
__________________
10 FX4 SCREW
Reply With Quote
  #7 (permalink)  
Old 06-20-2010, 05:37 AM
scraprat scraprat is offline
Posting Guru
 
Join Date: Jan 2002
Location: SD
Posts: 1,726
scraprat is a splendid one to beholdscraprat is a splendid one to beholdscraprat is a splendid one to beholdscraprat is a splendid one to beholdscraprat is a splendid one to beholdscraprat is a splendid one to beholdscraprat is a splendid one to behold
Seeing that you bought it used and don't know if the plugs where changed start there and change them. Then if it still doing it find the bad COP. Check to make sure there all on good to.
Reply With Quote
Old 06-20-2010, 05:37 AM
Reply

Go Back   Ford Truck Enthusiasts Forums > Super Duty/Heavy Duty > Super Duty & Heavy Duty

Tags
05, 2005, 54, 54l, code, f150, f250, ford, liter, misfire, p0300, po300, triton, trouble, truck

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 01:20 PM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup