HELP sinking feeling in gut after running cylinder contribution test! - Ford Powerstroke Diesel Forum
 
LinkBack Thread Tools Display Modes
post #1 of 3 Old 11-05-2013, 10:01 AM Thread Starter
Member
 
Join Date: Oct 2013
Location: Northglenn
Posts: 84
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
HELP sinking feeling in gut after running cylinder contribution test!

So just when I thought I was done wrenching for a while I ran a cylinder contribution test on my 02 7.3 with 129000 plus a change in rotational velocity test and here is what I got. Please help decipher.
Cylinder contribution test:
P0269 Cylinder 3 Injector contribution circuit/balance fault
P0284 Cylinder 8 " " "

When I replaced my wiring harness and glow plugs a week or so ago after putting the valve covers on I ohmed out the pins to the injectors before plugging back in the UVCH on the top side of the engine and all was good on communication.

I then checked the rotational velocity check and Cylinder three was around 3.5 to 4.2 and Cylinder 8 was around 4.5-5.4 where all others were right near zero like they are supposed to be.

I have read that the grey CPS which in mine is brand new from ford can throw off number 8 readings but I don't know if this is true. I am not blowing smoke on startup or while running and I am getting good mileage and from what I can tell (first powerstroke) the only running sound that is a little off to me is if I am under very light acceleration then it seems as though the "flutter" is a little off sequence but then again I have no cat and straight pipes. Quietest straight pipes I have ever heard by the way.

2002 F250 Good Old 7.3
126000 miles and counting




Gerald Ford (14 July 1913 26 December 2006)
"A government big enough to give you everything you want is a government big enough to take from you everything you have. "
Tdog77 is offline  
post #2 of 3 Old 11-06-2013, 05:14 AM Thread Starter
Member
 
Join Date: Oct 2013
Location: Northglenn
Posts: 84
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
I got this from Swamps site last night and am going with it....essentially I am going to ignore this one and if the issue gets worse I will run a compression test and bypass the dam AE program and possible CPS interference since I cannot get a black sensor anymore.


"Cylinder Contribution Tests can often flag cylinders #1 & #8, or #3 & #8 as both failing the CCT. Anytime #1 & #8 are paired as hacing balance faults...especially on 99-03 trucks, this may indicate a fuel delivery problem (pressure, contamination, etc). The pairing of #3&#8 are “companion” cylinders...so an internal or external engine balance problem will often show up as 3&8 cyls failing balance tests. We have also seen a CPS (camshaft position sensor) show false codes related to cyls 3&8...however if the engine runs normally, then it is our recommendation to simply ignore these phantom codes."

2002 F250 Good Old 7.3
126000 miles and counting




Gerald Ford (14 July 1913 26 December 2006)
"A government big enough to give you everything you want is a government big enough to take from you everything you have. "
Tdog77 is offline  
post #3 of 3 Old 11-06-2013, 05:55 AM
Compression Ignition Addict
 
Join Date: Dec 2007
Posts: 6,270
Thanks: 7
Thanked 249 Times in 240 Posts
Mentioned: 6 Post(s)
Quoted: 89 Post(s)
Feedback Score: 3 reviews
NoRalPh is offline  
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:
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