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 02-28-2012, 08:19 PM
nhredneck nhredneck is offline
New User
 
Join Date: Feb 2012
Posts: 3
nhredneck is starting off with a positive reputation.
2008 F150 5.4L barely staying running..Throws code P0012

The truck lost all power the other day driving and barely made it to work. On the ride home it was still running horribly, like it just fell on its face. the check engine light came on. Went to autozone and put HEET in the gas tank cuz the night before it was at quarter tank and temp went from warm to freezing(thought maybe condinsation in tank)..Truck ran alot better( not perfect). Drove around that day and it was fine. Pulled down the driveway and CE light shut off. Ran the code anyways and it was P0012.. Talked to a few mechanics and they said try replacing the Camshaft position sensors..did so and it ran worse. the truck hardly would idle or rev and shook vilantly..i shut it down right away. Then it threw 9 codes..Cam shaft position- over retarded timing bank 1(P0012), misfire cyl2, misfire cyl3, misfire cyl 4, random misfire, cam sensor bank 1, three of them were repeated codes.. I replaced the sensors back to stock and cleared the codes. the truck is running like it was in the beginning of the problem..No vilant shaking but falling right on its face at idle and any rpm..not drivable..ANYSUGGESTION BEFORE I TOW IT TO DEALER..would rather do the work myself. very capable except for replacing camshaft phasers which i have heard could be the issue..Could it by the VCT seliniod, EGR valve, plugs, wires...Did just change the oil a week ago and cleaned and reoiled air filter.
Reply With Quote
  #2  
Old 02-28-2012, 08:40 PM
air1jpg's Avatar
air1jpg air1jpg is offline
Senior User
 
Join Date: Aug 2007
Location: Louisville
Posts: 460
air1jpg is starting off with a positive reputation.
Quote:
Originally Posted by nhredneck View Post
The truck lost all power the other day driving and barely made it to work. On the ride home it was still running horribly, like it just fell on its face. the check engine light came on. Went to autozone and put HEET in the gas tank cuz the night before it was at quarter tank and temp went from warm to freezing(thought maybe condinsation in tank)..Truck ran alot better( not perfect). Drove around that day and it was fine. Pulled down the driveway and CE light shut off. Ran the code anyways and it was P0012.. Talked to a few mechanics and they said try replacing the Camshaft position sensors..did so and it ran worse. the truck hardly would idle or rev and shook vilantly..i shut it down right away. Then it threw 9 codes..Cam shaft position- over retarded timing bank 1(P0012), misfire cyl2, misfire cyl3, misfire cyl 4, random misfire, cam sensor bank 1, three of them were repeated codes.. I replaced the sensors back to stock and cleared the codes. the truck is running like it was in the beginning of the problem..No vilant shaking but falling right on its face at idle and any rpm..not drivable..ANYSUGGESTION BEFORE I TOW IT TO DEALER..would rather do the work myself. very capable except for replacing camshaft phasers which i have heard could be the issue..Could it by the VCT seliniod, EGR valve, plugs, wires...Did just change the oil a week ago and cleaned and reoiled air filter.
Could some of that oil gotten on the mas airflow sensor and gummed it up?
__________________
________________
Jon
2006 Black F-150 FX4 Off Road SCrew 5.4L
6.5' StepSide Box, 20" Cooper AT3 Tires, 3.73LS, Backup Camera,
Luxury Package, Cobra CB Radio, Tinted Windows
Electric Trailer Brake Controler, Hard Toneu Cover from Undercover(http://www.undercoverinfo.com)
Reply With Quote
  #3  
Old 02-28-2012, 08:52 PM
nhredneck nhredneck is offline
New User
 
Join Date: Feb 2012
Posts: 3
nhredneck is starting off with a positive reputation.
its a possibility..i pulled it ou and it was dry unless it got into it
Reply With Quote
  #4  
Old 02-28-2012, 09:26 PM
skunkoffroad skunkoffroad is offline
Senior User
 
Join Date: Jan 2009
Posts: 209
skunkoffroad is starting off with a positive reputation.
Quote:
Originally Posted by air1jpg View Post
Could some of that oil gotten on the mas airflow sensor and gummed it up?
That's the first thing I thought.
Reply With Quote
  #5  
Old 02-28-2012, 09:42 PM
Sequel Sequel is offline
New User
 
Join Date: Nov 2011
Posts: 17
Sequel is starting off with a positive reputation.
Just worked on a friend's F150 that had a p0012. We tried swapping the VCT solenoids and the issue still remained on bank 1. We ordered a cam phaser thinking that is what it was and it turned out the timing chain guide was busted. We ended putting the new phaser on, new chain guide and new tensioner.
Reply With Quote
  #6  
Old 02-28-2012, 09:45 PM
Sequel Sequel is offline
New User
 
Join Date: Nov 2011
Posts: 17
Sequel is starting off with a positive reputation.
Quote:
Originally Posted by air1jpg View Post
Could some of that oil gotten on the mas airflow sensor and gummed it up?

If something wrong with the mass airflow sensor, the problems would be on both banks. The issues here are clearly on bank 1.


It looks timing related.
Reply With Quote
  #7  
Old 03-03-2012, 01:53 AM
BLTZ71 BLTZ71 is offline
New User
 
Join Date: Feb 2012
Posts: 8
BLTZ71 is starting off with a positive reputation.
I would say timing to the one i had vct is only active after engine warm up rev up engine after you let off gas does it run bad or does it run bad all the time if runs bad all the time i would say cats clogged or timing is out for some reason. The one i worked on thrust bearings were in oil pan. WAS posted recently.
Reply With Quote
  #8  
Old 03-03-2012, 08:56 AM
Papa Tiger's Avatar
Papa Tiger Papa Tiger is offline
Elder User
 
Join Date: Mar 2012
Posts: 990
Papa Tiger has a good reputation on FTE.Papa Tiger has a good reputation on FTE.
Check you camshaft timing chain and tensioners. Cam is retarded = loose chain/broken tensioner guides.
Reply With Quote
  #9  
Old 03-04-2012, 01:45 PM
nhredneck nhredneck is offline
New User
 
Join Date: Feb 2012
Posts: 3
nhredneck is starting off with a positive reputation.
Tried changing the camshaft sensors and that changed nothing..put stock ones back in. I brought the truck to ford and they said it is the VCT soleniod. Should be done by monday.. willing to bet thats not the problem.

FYI.. 2008 F150s must have the valve covers removed to replace the VCT solenoids unlike earlier years such as 2004's
Reply With Quote
  #10  
Old 05-19-2012, 12:39 AM
Allan Robichaud Allan Robichaud is offline
New User
 
Join Date: May 2012
Posts: 1
Allan Robichaud is starting off with a positive reputation.
5.4 knock (the rest of the story)

I been doing some research and here is what i have come up with. The whole cam phaser problem has nothing to do with the acual cam phasers at all. I will try to explain. the cam phasers are 60 deg advance or retard gears mounted to your cam shaft at the front of the engine. The operation of this gear can be related to the operation of a snowmobile clutch but instead of moving by waights it is controlled by oil pressure (VCT SYLINOD). On the end of the sylenoid there is a worm gear that accually turnes to set the correct degree. the oil pressure is taken from a gallery in the head and sent threw an oil passage to the sylenoid. this passage is small and prone to pluging. hence the reason for this to fail is lack of maintnence , poor quality materials , inproper materials. The reason why dealers change everything from timming chain, guides ,vct syl and phasers is because when you drive your veha with a knock it is accually out of time. where the phasers are governed by a spring it tends to fatigue and loose it's stregnth therefore not being accurate anymore which will cause it to be sparatic like stall sometimes but not all the time, knock like a diesel, idle rough sometimes or all the time,and possablly act diffrent with heat (cold or hot engine)and you may or may not have a code as all the electronics are working as they should ( i had a code and erased it and could not get it to come back). Also by changing the phaser you run a new gear and it is good practice to run a new chain and let them wear into each other. But this gets costly as the techs halft to remove the front of the engine to do so. in closing 99% of the time the vct gets plugged and if you keep driving instead of replacing just that you end up replacing the phasers chain ect... the dealers are laughing at you saying oh go ahead it's not serious bring it in when you can, (You will not brake down and you will be able to fix it) but it will cost you more in the end lol. I managed to fix myne with a simple varasol bath and a pipe cleaner. Hope this helps you guys CHEERS!!!

Last edited by Allan Robichaud; 05-19-2012 at 12:46 AM. Reason: add a phrase
Reply With Quote
  #11  
Old 05-21-2012, 06:39 PM
Papa Tiger's Avatar
Papa Tiger Papa Tiger is offline
Elder User
 
Join Date: Mar 2012
Posts: 990
Papa Tiger has a good reputation on FTE.Papa Tiger has a good reputation on FTE.
The VCT's have very fine screens that clog or they break putting finewire in the valve sometimes locking it in place. Loss of oil pressure is suspect always.
__________________
Women might not find ya handsome but they will find ya in your F150.
Ford Built_Ford Tough
Reply With Quote
Old 05-21-2012, 06:39 PM
Reply

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

Tags
04, 150, 2004, 2005, 54, 54l, check, code, engine, f150, ford, light, p0012, poo12, replaced, vct

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 11:38 AM.


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