853 Bobcat misses at high idle

[BijouHills54]

I have a 853 that has a miss at high idle anything above 2200 rpm, I think it is straving for fuel, we replaced the fuel filter, and fuel lines and pick-up tube & screen in the tank and also put on electric fuel pump, we have plenty of fuel at injection pump, it starts fine but misses sounds like valves are floating but have checked valve clearance & injector pressure and the are okay. any suggestions I am thinking the injection pump is the problem.

 

[foton]

take your injectors out to a diesel injector/pump repair shop and have them spray tested would be my first move. I believe injectors fail more often than the pump.

 

[BijouHills54]

We pop tested the injectors they are within the specs for cracking pressurre we determined it is the advance in the injection pump.