Volvo VNM64T D13 Drinking Fuel, Injector (cup) issue?

When tey dod youre injector cups and changed youre injector they also probably did a tube up on the truck adjusting all the valves injectors and such the problem i think is there i dont think they set up the valves the correct way maybe they tight up the untake valves a little to much also try to clean out ure 7 injector and is it also possible if the truck was leaking coolant in the combustion then it loaded up the filters a bit i would day have youre valve adjustment checked to help out eith the fuel a bit u need to set intake valves little loose and exhaust a little tight

 

I would check the the exhaust manifold, too. One injector out of six it's a big question sign on that engine. Do yourself a favor and put it on a dyno. I know it is not so cheap but anyway, it's a lot cheaper then that method I hate from the bottom of my heart : " try and error". In the end you will end up with a lot more damage on the engine, tons of money and time spent guessing what that may be.