NEED OPINIONS/HELP... - Ford Powerstroke Diesel Forum
Ford Gassers A Place for Diesel nuts to discuss Ford Gasoline powered vehicles!!!

Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 07-16-2012, 02:06 PM
Compression Ignition Addict
 

Join Date: Oct 2011
Location: Delaware
Posts: 1,042
Thanks: 14
Thanked 3 Times in 3 Posts
Feedback Score: 0 reviews
NEED OPINIONS/HELP...

Guys,

I found a 99 F250 that I want to have as a beater... especially since my 6.0 left me walking until I get her fixed. Guys out of work, needs money fast and wants to sell me his truck. Truck looks sweet, 2 door short bed, custom rims. Only thing is the truck starts, runs great, but then shuts back off. Pulled codes, says misfire in cylinders 1,3,6 and two codes for fuel system to lean. He said that a Ford tech told him it was the ECM that was bad. I'm thinking that if the ECM was bad the truck wouldn't run let alone start. I'm thinking a sensor??? What do you all think? He only wants $500 for the truck, even if I have to dump a grand into it its still worth it to me. Hopeful that the 6.0 will be back on the road by October or November.

EDIT: should have added that its a 5.4 triton engine. DUH... lol.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 07-17-2012, 10:33 AM
Compression Ignition Addict
 

Join Date: Mar 2010
Location: North Florida
Posts: 332
Thanks: 3
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Go for it. When was the last time the plugs, COP's and boots were changed? I would also check the fuel filter to see if it's plugged.
Reply With Quote Quick reply to this message
  #3  
Old 07-22-2012, 07:00 PM
Military Member

 

Join Date: Aug 2005
Location: Born in OR. strokin in Texas!
Posts: 498
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Send a message via ICQ to jwiger Send a message via AIM to jwiger Send a message via MSN to jwiger Send a message via Yahoo to jwiger
If it starts then I doubt the COPs are bad (does it even have COPs? I thought 99 was still using coil packs... [Edit: just checked rockauto.com, it does have COPs]). The gas engines start with a baseline program that's stored in the computer. After a few seconds of running they start looking at sensors like the O2 sensor to fine tune the fuel mixture. I would pull the plugs one at a time and compare them to this chart. Also recommend a compression check while in there.

http://autolite.com/sites/default/a/...n/plugtips.pdf

My guess is the computer may be bad, but it's more likely you have a damaged wire harness or a leak in the intake or exhaust manifold, which is causing the engine to lean. Pull the spark plugs if they look like the engine is getting too much fuel then the leak is in the exhaust side, and the computer is adding too much fuel to compensate. if they look normal or lean then the leak would be on the intake side. If the harness is damaged, that gets tougher. You could pull the engine harness and inspect all of it for damage or grab a junkyard harness and hope it works.

For $500 bucks I would jump in with both feet! Worst case grab a junkyard computer and try swapping that in. Check for air leaks, maybe get a new engine/EFI harness. Good luck!

Last edited by jwiger; 07-22-2012 at 07:04 PM.
Reply With Quote Quick reply to this message
  #4  
Old 08-05-2012, 04:17 PM
Compression Ignition Addict
 

Join Date: Oct 2011
Location: Delaware
Posts: 1,042
Thanks: 14
Thanked 3 Times in 3 Posts
Feedback Score: 0 reviews
Okay guys here is an update. Still got the miss. As far as the system to lean one of the rubber hoses had a hole in it. Replaced that and no more codes for that. Changed out the O2 sensors and the Camshaft position sensor and replaced the fuel filter. Also replaced 2 COP that looks shady and changed the spark plugs. One of the plugs looked like it was not firing, the others looked REAL DIRTY. After the 2 new COP and plugs I pulled each wire harness off of the COP to see if I could get the engine to die down to see if they were firing. Everyone of them passed that test. So now I'm back at square one. Truck runs fine at idle with just a few pops in the exhaust until she calms down. Then about 15 seconds in the RPM's fall off a bit and she runs around 6 to 700 RPM and sounds choppy and ruff. Give the skinny pedal a tap and she clears up. On the road if you stay out of the throtle she has a miss but still goes ok, if you get into the gas she sounds like she floods up real bad. Anymore ideas?

EDIT: I also changed the fuel filter as well. Could it be something in the ECM itself or maybe an injector problem???
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 02:31 AM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors