Go Back   Ford Truck Enthusiasts Forums > Newer Light Duty Trucks > 2004 - 2008 F150
Sign in using an external account
Register Forgot Password?


2004 - 2008 F150 2004, 2005, 2006, 2007 and 2008 Ford F150's with 5.4 V8, 4.6 V8 or 4.2 V6 engine
SPONSORED BY:
Click HereAdvertisement

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  
Old 08-08-2011, 11:38 PM
a-teamer a-teamer is offline
New User
 
Join Date: Mar 2005
Posts: 11
a-teamer is starting off with a positive reputation.
04 shutter/sputter between 40-60 mph

I recently bought an 04 Lariat Crew Cab with 56k miles auto trans and 5.4. Before I bought it I complained that it had an exhaust noise, an acceleration issue at 40 mph and 1100 rpmís and the ac was not very cold. They replaced the exhaust manifold on pas side, the coil pack on the #3 cylinder, recharged the AC, did a tranny flush and a flash drive update. It seemed to fix the problems for the most part but I drove mostly 30 mph or less to and from work. I took it on a few road trips on the highway and country roads (40-60+ mph) and noticed the problem again and it became more consistent. It happens pretty much all the time when ac is on and overdrive is on between 40-60 mph and after decelerating and slowly accelerating. Less noticeable or less consistent with ac off and have never noticed it with over drive off under the same mentioned conditions and mph range. It feels like a limited slip kicking in or driving on dry pavement with 4wd on when it happens. The tranny shifts fine in straight acceleration pulls through all gears and even full throttle pulls. Problem only happens after decelerating and slowly accelerating. Any thoughts? Brought it back to dealer but the tech could not get it to repeat so I took him for a drive and he thought it might be another coil pack. The 60 day warranty is history so I donít feel like shelling out $$ for them to tell me what they think it is!
Reply With Quote
  #2  
Old 01-24-2012, 09:57 AM
06Mountaineer 06Mountaineer is offline
New User
 
Join Date: Jan 2012
Posts: 8
06Mountaineer is starting off with a positive reputation.
Same sputter 06 Mountaineer 4.6 V8

Did you ever solve this problem? My 06 has gone through 4 coil packs and plugs.. it's not fixing it. If you gently touch the gas at about 50-70 mph the bucking starts. Help I am out of Warranty!
Reply With Quote
  #3  
Old 03-15-2012, 10:37 AM
Airborne1's Avatar
Airborne1 Airborne1 is offline
Freshman User
 
Join Date: Feb 2012
Posts: 43
Airborne1 is starting off with a positive reputation.
Quote:
Originally Posted by 06Mountaineer View Post
Did you ever solve this problem? My 06 has gone through 4 coil packs and plugs.. it's not fixing it. If you gently touch the gas at about 50-70 mph the bucking starts. Help I am out of Warranty!
Anyone else have this problem or know of a solution?
Reply With Quote
  #4  
Old 03-15-2012, 12:29 PM
Bluegrass 7 Bluegrass 7 is offline
Postmaster
 
Join Date: Sep 2006
Posts: 4,951
Bluegrass 7 has a good reputation on FTE.Bluegrass 7 has a good reputation on FTE.
Here is the general info on such a 'specific' missfire.
When in those driving conditions the EGR is opened by the computer to let some exhaust gas back into the intake.
The ignition timing is advanced and fuel is cut back.
This results in a very lean mixture in the 20 to 1 range.
A lean mix requires much more spark voltage to fire the plugs .
If one coil has low output "under those driving conditions" a miissfire/stumble results.
As soon as the driving condition changes that cause the EGR to close, the missfire goes away.
This cancels a pending code for that cylinder because the condition has cleared. (Not a hard fault)
Bottom line is a coil is ususally the cause with shorted internal turns in it's winding.
It may be posible the EGR opening is more that it should be or letting to much exhaust gas return to the intake.
It's a toughy to get hold of but now you know the basis behind the cause.
Good luck.
Reply With Quote
  #5  
Old 03-15-2012, 01:48 PM
06Mountaineer 06Mountaineer is offline
New User
 
Join Date: Jan 2012
Posts: 8
06Mountaineer is starting off with a positive reputation.
Fixed Missfire

Bluergrass, your explanation makes perfect sense. The missfire went away when I pressed harder on the gas too.
So I took a chance and I replaced all of the coils on this truck that were not new. Two had been replaced by the dealer but then my warranty ran out, so I went here and bought 6 new Accell coils:

06 2006 Mercury Mountaineer Ignition Coil - Engine Electrical - Accel, Delphi, Denso, Karlyn, MSD, Motorcraft, Prenco, Standard Motor Products - PartsGeek

This corrected the problem immediately. When I lightly accellerate the problem is not there. It was happening only when the engine was warm too, which I think has something to do with when the EGR opens.

So all fixed, go buy the coils and replace them yourself in under an hour!
Reply With Quote
  #6  
Old 03-15-2012, 04:44 PM
Bluegrass 7 Bluegrass 7 is offline
Postmaster
 
Join Date: Sep 2006
Posts: 4,951
Bluegrass 7 has a good reputation on FTE.Bluegrass 7 has a good reputation on FTE.
Great to hear but the coils you chose are not very good over the longer time period.
They are made in China.
Expect to have issues again in the future with these coils.
Glad it proved the trouble but the coils can be bad actors later on, so good luck with them.
At least you know about it.
I have been there with these coils, that why I am replying about them, as a heads up.
Take care.
Reply With Quote
  #7  
Old 03-16-2012, 08:24 AM
06Mountaineer 06Mountaineer is offline
New User
 
Join Date: Jan 2012
Posts: 8
06Mountaineer is starting off with a positive reputation.
Thanks. I've got 60k on it and plan on driving to about 120k so maybe ill get 60k out of them. We shall see! Certainly the stock Motorcraft ones that cost 73 bucks didn't get me far, so I wasn't going to buy them again...
Reply With Quote
  #8  
Old 03-16-2012, 09:28 AM
70f100longbed's Avatar
70f100longbed 70f100longbed is offline
Posting Guru
 
Join Date: Aug 2002
Location: Raleigh USA
Posts: 1,034
70f100longbed has a good reputation on FTE.70f100longbed has a good reputation on FTE.70f100longbed has a good reputation on FTE.
You most likely need a set of spark plugs. The early design plugs are terrible and the gap widens very fast. I have pulled plugs with only 60k on them and the gap was over 0.070". The Motorcraft SP 515 plug is a lot better design and should solve your problems. The life of the coils will be shortened with worn plugs because it takes a lot more voltage to jump the gap and the spark duration will be shorter.
__________________
Ford senior master tech
Every 5.4 3V owner should have Lisle tool #65600
8L3Z-6M280-B updated VCT solenoids for 5.4 3V rattle
Reply With Quote
  #9  
Old 03-16-2012, 11:54 AM
Bluegrass 7 Bluegrass 7 is offline
Postmaster
 
Join Date: Sep 2006
Posts: 4,951
Bluegrass 7 has a good reputation on FTE.Bluegrass 7 has a good reputation on FTE.
Lets put it this way, the OEM coils are the best your going to get for quality and average life.
Since they are used from the factory, any other coil is of unknown quality, so the OEMs are the standard.
Realize that the coils live under very harsh conditions of heating and cooling from the heads, heat from the radiator and heat from the exhaust manifolds just after engine shutdown.
Like any other part, they are expendable over time same as tires and shocks.
You will replace most tires sooner than coils with their higher cost and think nothing of it , discounting exceptions to that like anything else.
Good luck.
Reply With Quote
  #10  
Old 03-16-2012, 06:17 PM
Coskid Coskid is offline
Postmaster
 
Join Date: Jul 2010
Location: Henrico, VA
Posts: 3,739
Coskid is a splendid one to beholdCoskid is a splendid one to beholdCoskid is a splendid one to beholdCoskid is a splendid one to beholdCoskid is a splendid one to beholdCoskid is a splendid one to beholdCoskid is a splendid one to behold
Quote:
Originally Posted by Bluegrass 7 View Post
Lets put it this way, the OEM coils are the best your going to get for quality and average life.
Since they are used from the factory, any other coil is of unknown quality, so the OEMs are the standard.
Realize that the coils live under very harsh conditions of heating and cooling from the heads, heat from the radiator and heat from the exhaust manifolds just after engine shutdown.
Like any other part, they are expendable over time same as tires and shocks.
You will replace most tires sooner than coils with their higher cost and think nohing of it , discounting exceptions to that like anything else.
Good luck.

I think this is the best I have ever heard someone explain the cost of the OEM coils. Well done sir!

I could not agree more with this post!
Reply With Quote
  #11  
Old 03-16-2012, 08:40 PM
Bluegrass 7 Bluegrass 7 is offline
Postmaster
 
Join Date: Sep 2006
Posts: 4,951
Bluegrass 7 has a good reputation on FTE.Bluegrass 7 has a good reputation on FTE.
Let me add something that may be of interest.
Any other coil has no real life history by compairison to the OEM units..
Buying high output coils in the hopes of gaining power will never happen on a stock motor.
All a coil needs to have is enough reserve voltage to fire the plugs under the worst conditions of EGR operation and erroded plug gaps to a reasonable degree before some type of service is needed.

To have higher voltage available from a coil is of no benifit.
The reason why is as follows:
Under normal air fuel mixtures in the 12 to 15 range, the voltage needed to fire accross the gap is always a function of the mixture density and to some degree cylinder pressure.
This requres in about the 7 to 10,000 volts range.
When the EGR is called to open, the mixture goes up to the 20 to 1 range.
Since this results in less density in the gap area, it requires 20,000 or more volts to cause the spark to jump the gap so you see voltage requirements go up drastically.
Here in, if a coil has low output, a missfire results as was the OP case above.
Bottom line is high output coils above about 40,000 volts on a fault free motor has no benifit.
To finish with a possible qustion that is often asked. If the plug only needs 7 to 10,000 volts to fire a normal mixture, what happens to the rest?
At the time the spark jumps the gap, the low resistance offered in the Plasma in the gap shunts down the coil output such that the voltage cannot rise any higher than the breakdown value and is lost.
This means the absolute voltage required is density dependent.
Installing coils of any higher output than what is needed withsome reserve has no benifit.
Power comes from the BTU content of the fuel in any given motor design.
Good luck.
Reply With Quote
Old 03-16-2012, 08:40 PM
 
 
 
Reply

Go Back   Ford Truck Enthusiasts Forums > Newer Light Duty Trucks > 2004 - 2008 F150

Tags
04, 1999, 30, 40, 60, ford, hour, miles, mph, navigator, pickup, ranger, reach, shutter, sputtering, sputters

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
2006 F250 Speedometer malfunction rylowe Super Duty & Heavy Duty 8 02-28-2013 08:12 PM
Stumble hartski 2004 - 2008 F150 9 05-31-2012 01:46 PM
04 with shuttering/sputtering at 40-60mph a-teamer 2004 - 2008 F150 7 08-11-2011 03:49 AM
2008 turbo problems kr1410 Super Duty & Heavy Duty 6 10-28-2008 01:36 PM
Shaking/Studdering jrtaylor 1997 - 2003 F150 29 12-16-2006 03:52 PM



All times are GMT -5. The time now is 11:27 PM.


Powered by vBulletin® Version 3.8.7 AC1
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. Fordģ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup