is there supposed to be oil mixture in the VST tank on the HPDI? I see there is an oil line going into the VST tank. The solenoid pump assy PN 68F-131-00-00-00 isn't putting any oil in the VST tank, not a drop on idle. I checked the plug and it's getting 12 volts. took the fuel from the VST tank and it had no oil tint to it. I want to make sure before running my motor again that the pump isn't bad. Plus the engine isn't smoking which is a sign of something isn't right..