contribution test numbers - Ford Powerstroke Diesel Forum

6.0L Problems Forum Having Trouble? Post here

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 15 Old 04-12-2012, 08:52 AM Thread Starter
Compression Ignition Addict
 
seadoo48's Avatar
 
Join Date: Sep 2007
Posts: 272
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: -1 reviews
contribution test numbers

my truck has been having an issue for a little while now, if the truck is warm it always is pefect at cold the truck will shutter and run like sh**. i originally thought maybe it was ficm but could be wrong. i drove it cold to my buddies shop. as soon as we plugged it in to do contribution test cylinder 2 was slowly dropping to - 20 then to -40. by the time we noticed it truck zeroed out. all were at zero at idle. alot of them were dropping under throttle tho. any ideas? what should i be seeing for numbers.? do i need 8 injectors? thanks

seadoo48 is offline  
post #2 of 15 Old 04-12-2012, 04:26 PM Thread Starter
Compression Ignition Addict
 
seadoo48's Avatar
 
Join Date: Sep 2007
Posts: 272
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: -1 reviews
To the top

Sent from my SCH-I510 using AutoGuide.com App

seadoo48 is offline  
post #3 of 15 Old 04-12-2012, 04:38 PM
Compression Ignition Addict
 
6.0kansaspowerstroke's Avatar
 
Join Date: Aug 2009
Location: southwestern kansas
Posts: 370
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
im having the same problem

04 f-250 crew cab xlt
5 inch turbo back
zoodad mod
foil delete
egr? what egr? O that thing i threw it in the recycling bin. See im still green
full bumper replacement
head studs coming soon
ride rite bags and flip over ball
hankook mt's 285's
SCT X3
custom tuned by innovative
edge insight cs
sinister coolant filter
blue spring mod
6.0kansaspowerstroke is offline  
post #4 of 15 Old 04-12-2012, 05:13 PM
Powerstroke Techie

 
Join Date: Nov 2010
Location: South Fayette/Pittsburgh PA
Posts: 5,825
Thanks: 33
Thanked 143 Times in 129 Posts
Mentioned: 0 Post(s)
Quoted: 13 Post(s)
Garage
Feedback Score: 4 reviews
You're never going to have a flat contribution under throttle. usually only at idle or light throttle do the RPM drops really tell you anything.

You may catch a heavy dead misfire under throttle but that's about it. If you're not feeling the miss it's probably not there.
sinner6.0L is offline  
post #5 of 15 Old 04-12-2012, 05:24 PM Thread Starter
Compression Ignition Addict
 
seadoo48's Avatar
 
Join Date: Sep 2007
Posts: 272
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: -1 reviews
Im def feeling the miss just don't know what to do with the scan tool to see what is dropping out. I initialy was thinking ficm but starting to think injector

Sent from my SCH-I510 using AutoGuide.com App

seadoo48 is offline  
post #6 of 15 Old 04-12-2012, 05:41 PM
Powerstroke Techie

 
Join Date: Nov 2010
Location: South Fayette/Pittsburgh PA
Posts: 5,825
Thanks: 33
Thanked 143 Times in 129 Posts
Mentioned: 0 Post(s)
Quoted: 13 Post(s)
Garage
Feedback Score: 4 reviews
what kind of scan tool were you using?
sinner6.0L is offline  
post #7 of 15 Old 04-12-2012, 05:43 PM
Member
 
Join Date: Nov 2011
Posts: 30
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
This is what I do: I let the truck sit over night, the plug in the scan tool( snap-on) then set up the contribution test, then start the truck and which every cylinder or cylinders can't 0 out those are the ones. But torn high presure o-rings can cause funky problems.

Sent from my DROIDX using AutoGuide.Com Free App

03 PSD - 5.5 Fabtech lift, 18x10 wheels, 35 toyo tires. Crowler Rods, OEM pistons, WOP III injectors, regulated return fuel system, gtp38 turbo, ARP studs everywhere, adrenline HPOP, Oil,trans,coolant bypass filter kits, Suncoast built trans, Detroit locker



[IMG][/IMG]
naraptor is offline  
post #8 of 15 Old 04-12-2012, 05:44 PM Thread Starter
Compression Ignition Addict
 
seadoo48's Avatar
 
Join Date: Sep 2007
Posts: 272
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: -1 reviews
I want to say snap on motus ? it was showing numbers with truck running. All were zero at idle for most part. One was bouncing around for about a minute. By then truck was almost warmed up

Sent from my SCH-I510 using AutoGuide.com App

seadoo48 is offline  
post #9 of 15 Old 04-15-2012, 03:50 PM
,,,,,,,,,,,,,,,,,,,,,,,,,
 
ZMANN's Avatar
 
Join Date: Feb 2008
Posts: 15,078
Thanks: 584
Thanked 736 Times in 703 Posts
Mentioned: 60 Post(s)
Quoted: 654 Post(s)
Feedback Score: 0 reviews
sounds like stiction and even the dealer couldn't figure mine out with a scan until a second injector had an issue


I don't see how you could drive it cold to the scan location and get a good test ?

like mentioned they need to really be cold
ZMANN is offline  
post #10 of 15 Old 04-22-2012, 05:16 PM Thread Starter
Compression Ignition Addict
 
seadoo48's Avatar
 
Join Date: Sep 2007
Posts: 272
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: -1 reviews
Did a cold contribution test today. Cylinder 4 was pretty much dead till warm. Others were all over the place too till warmed up? think i need an injector and ficm?

Sent from my SCH-I510 using AutoGuide.com App

seadoo48 is offline  
Reply

Tags
contribution , ficm , injectors

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:
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:
OR

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
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