D13 Fuel Problem (HEAD SCRATCHER)

I hate cold weather issues like that. I had a similar issue on a small piece of portable construction equipment earlier this week. Was getting a ton of air in the fuel. Replaced every single fuel line and bypassed the filters. Still didn't fix it. Ended up finding a small hairline crack in a steel 90 degree fitting. Pulled my hair out for 2 days trying to find that one. I've never seen a Volvo engine before but it might be worth checking the fittings for cracks.

 

??? Mine had a busted hose clamp on the aluminum tube/rubber hose going to the tube that pumps the raw diesel into the exhaust.Apparently sucked in some -5 ° air and moisure was clogging exhaust.Had to regen it with a laptop for an hour get it up to 1000 degrees to burn all the crap out.Kinda smelled like a Meth Lab ( not that I would know). Fancy (hose clamp) with a tee and a spring that looks like a Valve Spring off a Chevy.Is there any whining when you throttle it?

 

Hey Cousin! Had one doing this a month ago. Did what you did (dealer did cups since I refuse to do any more) Ended up being that aftertreatment fuel module that feeds the 7th injector located down low, driver side block. Good luck!

 

Collapsed fuel line?

 

Hmm.........I am thinking with a cup of coffee.......

 

I did an PM oil change in TA truck stop, in Georgia, when the lube genius removed the fuel filter came out with the mounting part and lost the piece inside , it's a hexagonal plunger like a .50 cal size bullet ,conical at both ends,that gravitationally regulates the fuel pressure through filter. He didn't say anything, installed filter back, I paid the bill the truck was not pulling was showing low fuel presure moving 45 mph, I could.t pull the trailer, took it bob slowly to Volvo in Atlanta and it cost me 1000$ to replace the whole fuel filter assembly, because they don't sell the little piece . It's kind of poor design, if the fuel filter is over torqued at installation ,there's are good chances to come off with this mounting part at next filter change .I don't change oil in truck stops anymore.
The worst hidden problem with kind of similar symptoms I ever had on D13 was a malfunctioning EGR valve without throwing any codes . I took to most Volvo Shops from Texas to Ontario, they could figure out. Here in Ayr ,ON at Volvo , a technician tried everything suspected egr, replaced it and problem solved.