injector down? - Ford Powerstroke Diesel Forum
LinkBack Thread Tools Display Modes
post #1 of 5 Old 12-22-2011, 11:43 AM Thread Starter Fanatic
Join Date: Mar 2010
Posts: 120
Thanks: 1
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
injector down?

Hey Guys,

Before I start background on myself. Marine Mechanic, little first hand diesel experience. Pretty well informed on how diesels work etc.

95 f350 with 107,000 on it.

The truck has been running poorly the last couple weeks and I have not made it a priority to really figure out the issue. Finally took some time this afternoon to see what was wrong. Rough idle, poor acceleration, typical sounds of a cylinder not running properly. When it first started becoming a problem I could let the truck run 15-30 minutes of driving and it would be fine, then at some point the poor running condition would begin. At this point the poor running condition is constant.

Took the valve cover off of the driver side of the motor and started disconnecting the cylinders 1 by 1. I forget how ford numbers their cylinders as I work on mostly GM, but it seems there is no change in the motors running condition when i disconnect the second injector from the front of the motor. I am strongly leaning towards either the injector being down or possibly could I be dealing with a wiring issue? I dont understand why now there would be an issue with the wiring harness. Its clean, no cuts or any worn wires.

Does anyone know of a way to test for an injector being down other than what I have done so far? I wish I had a spare injector to swap before purchasing one because I cannot imagine there is the ability to return an injector once it has been purchased.

Thank you in advance for any and all help

wakeboardin2k4 is offline  
post #2 of 5 Old 12-22-2011, 11:18 PM
Compression Ignition Addict
Join Date: Mar 2011
Location: Houston, Tx
Posts: 1,977
Thanks: 4
Thanked 85 Times in 85 Posts
Mentioned: 0 Post(s)
Quoted: 52 Post(s)
Feedback Score: 0 reviews
Find a good shop that can do an injector buzz test. This will tell you if there is an injector not running right. A good scan tool can do this test. Question is, where did you find this 95 with only 107k? I want one!
White95f250 is online now  
post #3 of 5 Old 12-23-2011, 04:11 AM Thread Starter Fanatic
Join Date: Mar 2010
Posts: 120
Thanks: 1
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
I'll try and find a place to do that buzz test.

You can buy this one with 107k. It's been nothing but a headache. I had always wanted an OBS with a 7.3 for their power and reliability. Then I found this one with 89000 on it a little over a year ago and I thought I had it made. Sure enough I've had to replace the motor because the previous owner sold the truck to me with a crack in the block concealed with JB weld and nicely hidden behind the starter.

Swapped the motor with a donor of another 350. And now I've got an injector down, read main seal leak (which i replaced before installing the new motor),oil cooler leak and a few other leaks. And on top of that my old motor with all my spare parts is sitting in the garage of my not so friendly x-girlfriends house.

Thank you for dealing with my rant about this truck. BUZZ TEST IT IS!!!

1995 f-350, 108,000 miles and climbing, second motor with approximately 130,000 miles on it.

DIY Intake, stage 2 injectors from Rosewood, 3" DP to 5"side dump with a 6" Tip

HPOP, 6.0 IC (anyone have a spyder?) and E fuel to come
wakeboardin2k4 is offline  
post #4 of 5 Old 12-27-2011, 12:51 PM
Join Date: Sep 2008
Location: Fort Bragg, NC/Buff, NY/Midlothian, VA
Posts: 5,630
Thanks: 0
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
These trucks rarely EVER develop rear main seal leaks. It's probably something else I'd bet.
85_305 is offline  
post #5 of 5 Old 12-27-2011, 03:30 PM

351fifty's Avatar
Join Date: May 2011
Location: Canton and kennesaw
Posts: 23,180
Thanks: 34
Thanked 207 Times in 195 Posts
Mentioned: 1 Post(s)
Quoted: 3 Post(s)
Feedback Score: 4 reviews
Good luck with the buzz test, that would be a good place to start before buying injectors

2000 excursion V10 2wd 230k
2000 Excursion 7.3 4x4 246k
1995 CCLB DRW 324K
2001 CCLB DRW 319K
Dp tuner infinity, exhaust, intake, chipped, tricked, and wrecked

Originally Posted by marine5811
The stock downpipe in an OBS is flat because I'm a ginger.
Originally Posted by alberta 7.3
Finding a decent woman is like shopping for a used truck. You spend most of your time picking through the money pits, wrecks, and basket cases until you find one that you can tolerate
Originally Posted by JJFLASH
Well at least you caught the loose bolts before they cause any damage. Nothing worse than a sloppy hole
351fifty 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