1985 ford f250 6.9 - Diesel Forum - TheDieselStop.com
6.9L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 6.9 Liter In-Direct Injection Navistar engines.

LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 12-13-2012, 04:48 PM Thread Starter
Junior Member
Join Date: Dec 2012
Posts: 1
My Photos: (0)
Feedback Score: 0 reviews
1985 ford f250 6.9

Hi everyone I have a sweet old ford I bought a couple months ago and it really just seems to be week. This Is my first diesel truck so I don't really know anything about them. When I go up hills I lose speed and alot of power. Also if I'm parked on even the slightest uphill slope it will start and then sputter out. If I have to park on a hill i have to floor it for a couple seconds to get it running. Thanks in advance for any help and suggestions.
Tnarg is offline  
Sponsored Links
post #2 of 2 (permalink) Old 12-17-2012, 06:49 PM
Senior Member
Join Date: Jan 2004
Location: Germanton,NC
Posts: 156
My Photos: (0)
Feedback Score: 0 reviews
It sounds like to me it is sucking air in the fuel system somewhere. Check the hard metal lines going to the filter housing and the injector pump, the brass fittings have rubber gaskets in them that after time will get hard and crack. There is also a possibility the filter housing could be cracked and sucking air. After you address the sucking air problem and the truck still seems slow with no power, change the fuel filter, if that does not help change the injection pump and injectors. Good luck!

1989 F-250 4x4 7.3 C-6 315000 miles and counting-sold
2001 Excursion Limited 4x4 7.3 165000 miles-new transmission-12-24-12
2008 F450 XLT CC 4X4 4.88 gears 11' Reading Service Body 168000 miles-too nice to be a work truck-new engine, 5th radiator
2001 F250 4X4 Lariat CC bought April 2011 185000 miles
farmtruck is offline  
Sponsored Links

  Diesel Forum - TheDieselStop.com > Ford Diesels > 6.9L IDI Diesels (Not Power Strokes)

Quick Reply

Register Now

In order to be able to post messages on the Diesel Forum - TheDieselStop.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


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.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

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

For the best viewing experience please update your browser to Google Chrome