Notices
1997 - 2003 F150 1997-2003 F150, 1997-1999 F250LD, 7700 & 2004 F150 Heritage
Sponsored by:
Sponsored by: Auxito

Rough Running

Thread Tools
 
Search this Thread
 
Old Jan 20, 2010 | 09:52 PM
  #1  
Cain64's Avatar
Cain64
Thread Starter
|
Freshman User
Joined: Jan 2010
Posts: 36
Likes: 0
Rough Running

Today my truck started running rough especially at idle. It feels like its a misfire but there is no CEL or code. The roughness goes away around 2K RPMS which i normally drive below for gas reasons. But the rough running is still there. Possibly plugs? Or Coil packs? Or something im missing there is a bad vibration that you feel becasue of what seems like a misfire.
 
Reply
Old Jan 20, 2010 | 10:28 PM
  #2  
fordtech08's Avatar
fordtech08
Posting Guru
Joined: Aug 2008
Posts: 1,211
Likes: 1
check for a vac leak, no idea what you drive so can't tell you where to look
 
Reply
Old Jan 21, 2010 | 07:16 AM
  #3  
Cain64's Avatar
Cain64
Thread Starter
|
Freshman User
Joined: Jan 2010
Posts: 36
Likes: 0
Its a f150 5.4L, why would a vaccuum leak bring this up ?
 
Reply
Old Jan 21, 2010 | 07:56 AM
  #4  
fordtech08's Avatar
fordtech08
Posting Guru
Joined: Aug 2008
Posts: 1,211
Likes: 1
more air then the computer can tell is being burned in the system, the computer can't regulate the fuel correctly, over 2000 rpm most vac is gone,

follow the tube from your pcv valve there should be a rubber elbow that likes to turn to mush
 
Reply
Old Jan 21, 2010 | 10:44 AM
  #5  
Cain64's Avatar
Cain64
Thread Starter
|
Freshman User
Joined: Jan 2010
Posts: 36
Likes: 0
Ok i will check that if it is bad should i just get a new piece of it or something. It is more constant now and wont stop the truck is running bad till 2000 RPMS then it is better, i was gonna do my plugs but should i start with that rubberr piece?
 
Reply
Old Jan 21, 2010 | 10:49 AM
  #6  
fordtech08's Avatar
fordtech08
Posting Guru
Joined: Aug 2008
Posts: 1,211
Likes: 1
yeah I saw the little elbow at auto zone in the vac hose connector section for about 3 bucks the inside diameter is about the size of a finger
 
Reply
Old Jan 21, 2010 | 12:05 PM
  #7  
Cain64's Avatar
Cain64
Thread Starter
|
Freshman User
Joined: Jan 2010
Posts: 36
Likes: 0
Ok now is it plastic or foam or rubber?
 
Reply
Old Jan 21, 2010 | 02:27 PM
  #8  
fordtech08's Avatar
fordtech08
Posting Guru
Joined: Aug 2008
Posts: 1,211
Likes: 1
the elbow is rubber the hose is a plastic it could have foam wrapped around it
 
Reply
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

Top 10 Ford Truck Tragedies

 Joe Kucinski
story-1

AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

 Brett Foote
story-2

Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

 Michael S. Palmer
story-3

Ford's 2001 Explorer Sportsman Concept Looks For a New Home

 Verdad Gallardo
story-4

10 Best Ford Truck Engines We Miss the Most!

 Joe Kucinski
story-5

2026 Shelby F-150 Off-Road: Better Than a Raptor R?

 Brett Foote
story-6

2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

 Michael S. Palmer
story-7

10 Most Surprising 2026 Ford Truck Features!

 Joe Kucinski
story-8

Top 10 Ford Trucks Coming to Mecum Indy 2026

 Brett Foote
story-9

5 Best / 5 Worst Ford Truck Wheels of All Time

 Joe Kucinski
Old Jan 21, 2010 | 09:37 PM
  #9  
Cain64's Avatar
Cain64
Thread Starter
|
Freshman User
Joined: Jan 2010
Posts: 36
Likes: 0
Well ran over to my mechanic and the elbow is fine. they actually look fairly new. Im gonna check and regap and problky swap plugs tomorrow along with a scan tool to try and oick something up.

Could i figure out which cylinder by disconnecting the coil packs one by one. Disconnect one if the motor changs then not that one, plug it back in and then repeat for all plugs till find the one where nothing changes wether its plugged in or not
 
Reply
Old Jan 22, 2010 | 09:31 AM
  #10  
jennkent5454's Avatar
jennkent5454
Senior User
Joined: Nov 2009
Posts: 147
Likes: 1
check your PCV it may not be seated correctly, also pop it out and shake it, if it rattles, it is good, if no rattle it could be clogged, spray a can of throttle body cleaner on all the vacuum lines and see if on is leaking.
 
Reply
Old Jan 22, 2010 | 05:13 PM
  #11  
Cain64's Avatar
Cain64
Thread Starter
|
Freshman User
Joined: Jan 2010
Posts: 36
Likes: 0
Started to replace the plugs today ending up to only be able to get the front 4 out. I cant get a ratchet in there to get the rear 4. Any ideas? PCV is fine checked it and they have been replaced not long ago. No codes still.
 
Reply
Old Jan 22, 2010 | 05:38 PM
  #12  
fordtech08's Avatar
fordtech08
Posting Guru
Joined: Aug 2008
Posts: 1,211
Likes: 1
Originally Posted by Cain64
Started to replace the plugs today ending up to only be able to get the front 4 out. I cant get a ratchet in there to get the rear 4. Any ideas? PCV is fine checked it and they have been replaced not long ago. No codes still.
use a different size extension and try some swivels
 
Reply
Old Jan 22, 2010 | 07:53 PM
  #13  
Cain64's Avatar
Cain64
Thread Starter
|
Freshman User
Joined: Jan 2010
Posts: 36
Likes: 0
I have tried im gonna try again tommorrow. Just been having trouble getting to it. I have only had the truck a month and am having quiet a few problems and im losing fait.
 
Reply
Old Jan 22, 2010 | 10:18 PM
  #14  
jennkent5454's Avatar
jennkent5454
Senior User
Joined: Nov 2009
Posts: 147
Likes: 1
I just did my wifes for the first time and it just took a little time but was easy. all I used was a ratchet (3/8), the spark plug socket, and a 6 in wobble extension.
the wobble extension is just like the regular extension but the tip where the socket connects is made a little different so that the socket kinda dangles off the end. I always stuck the socket with the extension attached into the whole first then put the ratchet on the extension.

the wobble extensions set I bought for my son at harbor freight for like $10. made in china but it did the job i needed it to.

- Harbor Freight Tools - Quality Tools at the Lowest Prices ---this is the link to the extensions



ALSO READ THIS:
https://www.ford-trucks.com/forums/1...ark-plugs.html
 
Reply
Old Jan 23, 2010 | 12:35 PM
  #15  
Cain64's Avatar
Cain64
Thread Starter
|
Freshman User
Joined: Jan 2010
Posts: 36
Likes: 0
Yup im gonna do the other 4 tomorrow it wont take too long i dont think i was running out of light and had to get to work.
 
Reply




All times are GMT -5. The time now is 10:01 AM.

story-0
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-1
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-2
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-3
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-4
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-5
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-6
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE
story-7
10 Most Surprising 2026 Ford Truck Features!

Slideshow: 10 most surprising Ford truck options/features in 2026.

By Joe Kucinski | 2026-05-05 11:17:22


VIEW MORE
story-8
Top 10 Ford Trucks Coming to Mecum Indy 2026

Slideshow: Here are the top 10 Fords coming to Mecum Indy 2026.

By Brett Foote | 2026-05-04 13:49:49


VIEW MORE
story-9
5 Best / 5 Worst Ford Truck Wheels of All Time

Slideshow: The 5 best and 5 worst Ford truck wheels of all time

By Joe Kucinski | 2026-04-29 16:49:01


VIEW MORE