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 06-23-2010, 02:54 PM   #1
Junior Member
 
Join Date: Jun 2010
Posts: 9
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default 2004 engine miss

i have a miss in my 2004 f150 that i can't figure out. i am not getting any codes, checked with my edge evo and a hand held obdII computer. i have tried all settings and even back to stock and i can't tell a difference. i have noticed thAT WHEN i drive in the morning(cooler air) that it runs alot better, after work it gets bad, mostly at higher rpm's such as when i am going up hill or getting on to interstate. lower rpm's and just normal driving seems fine but if i step down on it it shifts down and gets louder but feels like i have several tons of weight behind me and it misses and puts a good bit. any help or ideas would be greatly appreciated
murdog is offline   Reply With Quote
Old 06-23-2010, 02:59 PM   #2
Member
 
Join Date: Apr 2010
Location: Everywhere
Posts: 4,124
Mentioned: 0 Post(s)
Thanks: 0
Thanked 8 Times in 4 Posts
Feedback Score: 0 reviews
Default

Sounds like you have a Cop (coil over plug)on the way out...have you checked those? When the engine is hot and missing unplug each cop one at a time till you find the dead one(no change in the engine when unplugged). It's only one small bolt to take out...pull the old one out and replace with one from napa/autozone etc.

Last edited by westtnfx4; 06-23-2010 at 03:01 PM.
westtnfx4 is offline   Reply With Quote
Old 06-23-2010, 03:11 PM   #3
Junior Member
 
Join Date: Jun 2010
Posts: 9
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

thanks for the help, it is not missing at idle so would that still work as i would have to rev it up to 3 thousand rpm's or so
murdog is offline   Reply With Quote
Old 06-23-2010, 03:16 PM   #4
Member
 
Join Date: Apr 2010
Location: Everywhere
Posts: 4,124
Mentioned: 0 Post(s)
Thanks: 0
Thanked 8 Times in 4 Posts
Feedback Score: 0 reviews
Default

It will not miss (or be noticable at idle)...but you will still be able to tell which one is dead...(you will feel the engine start missing if it's a good cop that you have unplugged)they are wierd like that....matter of fact they won't miss usually till the engine is under a load at say 1500 rpms or so...

Last edited by westtnfx4; 06-23-2010 at 03:19 PM.
westtnfx4 is offline   Reply With Quote
Old 06-23-2010, 05:01 PM   #5
Junior Member
 
Join Date: Jun 2010
Posts: 9
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

i will try that thanks for your ideas
murdog is offline   Reply With Quote
Old 06-23-2010, 07:00 PM   #6
Member
 
Join Date: May 2010
Location: Arizona
Posts: 56
Mentioned: 0 Post(s)
Thanks: 2
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

i had the same problem it was my cylinder 4 and 5 replaced sparkplugs and the two bad coil packs! runs smooth now.
dase520 is offline   Reply With Quote
Old 06-25-2010, 04:55 PM   #7
Junior Member
 
Join Date: Jun 2010
Location: Hollywood, Florida
Posts: 4
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

I had that same issue about 4 months ago. It was a bad injector. Good Luck.
Hollywoodfish is offline   Reply With Quote
Old 06-25-2010, 08:33 PM   #8
Something
 
Join Date: Sep 2009
Location: Sussex Co. Delaware
Posts: 215
Mentioned: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Smile

I'd bet on a weak coil. The spring inside of the boot that transfers the electrical pulse to the plug can get awfully rusted and deteriorated. You may just need to replace the boots on one or all of your coils. Your cheapest option is to buy 1 coil boot and a can of dielectric gel. Squirt some dielectric into the boot, in the middle of the spring and seat it around each COP. Really if you just pull the COPs you can look inside the boot and see how much rust is in there. If you have a 5.4 the drivers side tends to get more water and mud up into the engine bay and thus falls onto the top of the engine and into the holes where the plugs and COPs lie (yeah, I'm bad with names of engine parts). Could be a bunch of rust on your drivers side COPs.

How many miles are on your truck? If it's over 60K you might want to pull out the plugs and check them too...but we all know where that can get you and if you're not getting any "random misfire" codes or that check engine light blinking on and off then probably not the plugs. Although can you trust the computer all the time??? NO...

You could always replace the entire COPs too; I found a whole set of new ones on ebay for around 100.00, for all 8! I waited for a couple of weeks to find the good price, but it can be done. Patience is key.

What is getting at me is you say this doesn't happen in cooler weather. At all????? I mean, it's 70 degrees F outside and you smash down the pedal and you don't get ANY missing? And then if it's 95 degrees F you do????? I will think about that and search for a few ideas. But let us know, cooler air and no miss at all above 2500-3000 RPM???

Last edited by xJimbos; 06-25-2010 at 08:36 PM.
xJimbos is offline   Reply With Quote
Old 06-28-2010, 10:42 AM   #9
Junior Member
 
Join Date: Jun 2010
Posts: 9
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Question

yes there is some miss in the cooler weather but not as bad i just recieved my lisle sparkplug tool kit in the mail over the weekend so i may start on the drivers side changing the plugs tonite. Is there a way to check the cop's when removed from the truck?
murdog is offline   Reply With Quote
Old 06-28-2010, 01:22 PM   #10
Junior Member
 
Join Date: Jun 2010
Posts: 6
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default similar

I have something similar with my 2000 f150 4.2v6 would that be the same as the coil pack?
tbspeed1 is offline   Reply With Quote
Old 06-28-2010, 01:22 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Engine miss dpjag 8 Cylinder Engines 6 02-06-2010 08:53 AM
Engine Miss Davidlx9 1997 - 2003 Ford F150 0 01-05-2010 12:00 PM
Engine Miss DerbyTracr 1997 - 2003 Ford F150 3 10-24-2009 11:06 AM
Engine miss yukon1957 General F150 Discussion 0 09-27-2009 01:01 PM
4.6L Engine Miss ljones0525 Engine / Drivetrain Talk 4 10-21-2008 10:38 AM

Join F150 Forum

 

The Mustang Source
All times are GMT -4. The time now is 02:33 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2006 - 20011 F150forum.com
This site is in no way affiliated with the Ford Motor Company.