My N7 starting bogging down at the end of last season. I could kill the machine and restart and it would do ok for a while. This season it has gotten bad. I thought it might be gunk in the tank. But this is not the case. If I keep the machine below 15psi of boost pressure it will not bog down as often. If the engine is cool it bogs down less. It seem I might be having problems with the injector pump? I am adding a electric pump and regulator this morning to the fuel system to pack the injector pump. I will try setting the regulator at a low PSI (2 or 3) to start with. I only like 200 acres of wheat but need to run faster than 3mph. Any suggestions? Thanks Marshall