Have a buddy with a gehl forklift with JD 4045. Unit was running bad so he pulled the injection pump and had it rebuilt. Re installed pump and ran it for a day. Now the forklift will only start once a day and runs no longer than 20 seconds and kills. Once it kills it will spin over but no start until next day. He even had the ECU flashed by the dealer. When it does start the one time it starts right up. Crack an injector and it’s getting fuel maybe not enough but even if you put a gas rag in intake it still will not start. Hope someone might have a clue?