Leaky injectors? - Ford Powerstroke Diesel Forum
LinkBack Thread Tools Display Modes
post #1 of 3 Old 03-26-2008, 08:56 PM Thread Starter
Powerstroke.org Rookie
Join Date: Dec 2007
Posts: 21
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Leaky injectors?

I've noticed a 4 MPG drop in mileage over the last year. I had the dealership run a buzz test and a contribution test. They said everything is fine. Will these tests detect leaky cups? The PCM was also reflashed a year ago. Anyone ever seen a 4 MPG decrease from a dealer reflash?

2003 F350 Crew Cab 4X4
TS Performance 6 pos with Wildman tunes, 3 Pillar, EGT, Boost, Trans gauges, 5 inch turbo back straight pipe, Banks wheel, & Turbo Master wastegate, 2 inch lift
Soon to install Zoodad and Amsoil dual bypass filter.
fredbear is offline  
post #2 of 3 Old 03-29-2008, 07:06 AM
Compression Ignition Addict
wesjones's Avatar
Join Date: Sep 2005
Posts: 422
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Have you been putting in straight ULSD for the past year? Alot of the seals for like the fuel filter, and i think the injectors were designed to expand from a reaction with the sulfur in the fuel, making a perfect seal......thats the problem with ULSD, not enough sulfer content to make the seals work perfectly.

If you have no codes i would suggest a fuel lubricant like K-100 or Powerservice.

Sorry for the late post...

2001 F-250 XL 7.3 PSD, 5" MBRP Turbo-Back Exhaust, K&N FIPK Intake...

wesjones is offline  
post #3 of 3 Old 03-29-2008, 07:20 AM
lifetime member
Join Date: Aug 2006
Location: jacksonville, florida
Posts: 1,642
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
power service diesel kleen for sure. i love it!

january 2003 6.0 F-350 Lariat 4x4 cc with 08 long bed. recon cab and mirror lenses, torqueshift(reman on 9-03-09) with three disc billet convertor(500 rpm lowered stall speed),mag-hytec deep tranny pan,, 8" fabtech lift w/ 37" iroc super swampers on helos,pro comp ladder bars, custom sct x3 with tunes by eric @ innovative diesel, boost and pyro,edge insight, afe, 4" straight piped, ARP headstuds, banks intercooler & high ram intake. engine mods & maintenance by first coast diesel performance.
nsrchofpwr is offline  

Quick Reply

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:
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.

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