Code 4726
09-10-2020, (Subject: Code 4726 ) 
Post: #10
RE: Code 4726
(09-10-2020 )Bama Boy Wrote:  K stopped at another dealer, got fuel relief valve for $132. Replaced myself. Leak down test inconclusive because computer kept disconnecting when i turn off engine. I reset code and riding to see if it comes back.



User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!.
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 Thanks given by: redbeard
09-10-2020, (Subject: Code 4726 ) 
Post: #11
RE: Code 4726
This is what I was doing, but kept losing connection with insight. I will try again when I stop for the night.
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09-10-2020, (Subject: Code 4726 ) 
Post: #12
RE: Code 4726
when its does connect how muc pressure does it have? a good system will keep pressure for a good 10 minutes... if in 1 minute it takes it to connect its down to less than 2000 psi then you still have a issue...
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09-10-2020, (Subject: Code 4726 ) 
Post: #13
RE: Code 4726
I'll let you know, I think it had dropped to almost 100 just that quick
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09-10-2020, (Subject: Code 4726 ) 
Post: #14
RE: Code 4726
Yes, it is leaking down faster than it will reconnect. I ran cylinder cut out test, it ran on every cylinder individually but seemed a little rougher on #4, I guess its time to learn cap nut test deal
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09-10-2020, (Subject: Code 4726 ) 
Post: #15
RE: Code 4726
Do you know what size cap nuts are? I picked up some that are 1/2 inch brass but not sure they will work
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09-10-2020, (Subject: Code 4726 ) 
Post: #16
RE: Code 4726
(09-10-2020 )Bama Boy Wrote:  Do you know what size cap nuts are? I picked up some that are 1/2 inch brass but not sure they will work

brass caps will not work... the system has potential pressures as high as 40,000 PSI in it. You need the proper caps from cummins to keep from harming your engine or yourself.


User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!.
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09-11-2020, (Subject: Code 4726 ) 
Post: #17
RE: Code 4726
K the hunt for the caps begin
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09-11-2020, (Subject: Code 4726 ) 
Post: #18
RE: Code 4726
Do yall have a part # for the cap off nuts? All I can find is for 6.7 cummins
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