Scania 164. 480 problem

newmercman:
As it’s a 164-480 I’m guessing it’s got a few miles under its bumper, I’d check the fuel lines, the rubber hoses go wonky on the inside, they’ll look fine from the outside, but they balloon up on the inside and cause fuel restriction, at 1400rpm on a hard pull you’re asking for a lot of fuel, so any fuel restriction will show up more in that situation, it’s a cheap easy fix l:

Had the same problem a couple of years ago on a 04, changing the hoses sorted it.