Detroit diesel injector installation - 1990 Mercedes-Benz 300 Diesel

run fault codes
indicates crank position sensor not allowing power to the injectors because there is no record of where the piston is
next word of advice
DIESEL ENGINES ARE COMPRESSION IGNITION ENGINES
that means they ignite atomized fuel at the correct no of degrees BTDC
using easy start will detonate as soon as the compression temp is high enough and has on many occasion driven the piston back down against rotation, bending con rods and breaking cranks and even blowing engine crankcases apart
diesel engines especially cummins , Detroit and Perkins are not forgiving like petrol engine so if you have a problem seek expert advice from qualified diesel shops

What type of injector pump? Cummins? Detroit? ........? There is usually only one way to install the pin to obtain proper timing

most diesels have the fuel pump integral with the pressure pump
you are talking about the transfer pump and not the high pressure injector pump a mention of what engine you have is better than the truck make as peterbuilt normally run 3 makes of engines ---cat, detroit or cummins

http://diesel.btc.ctc.edu/Engines/Detroit%20Diesel/EGR%20s60techguide.pdf

6.2L diesels ... 84-86 time period (mostly 1984) & were powered by 6.2L Detroit Diesel V8 engine. ... Many M1028s were upgraded at the company level to M1028A2 and A3 specs. ... rated at 155 hp (116 kW) and 240 lb·ft (325 N·m), which was 5 hp (3.7 kW) .

did you refill fuel filters, and you may have to bleed injectors

it will be unlikely as a Detroit engine is designed to fit gearboxes behind it . IT is a standard 1 or 2 housing and by knowing this it cam be decided if a certain box used in heavy vehicles will fit behind the engine . Having said that there may be an adaptor plate to do what you want. Talk with Detroit engineers in line for any information that they can give. However the 4 cylinder 2 stroke Detroit diesel was not an engine that met emission standards and thirsty and was a very noiye engine that in a car will make listing to the audio system practically impossible

run fault codes to check for injector problems. check the vent valves on the tanks are not blocked. check cranking speed is correct. check fuses to the ecm unit are connected correctly. check air cleaners are not blocked.

Sounds like fuel filter/water seperator clogged.

What state are you in?