It seems that almost everytime I go out on my brand new Greasecar Vegetable oil system, I manage to hit these mysterious air bubbles that must be hidden within the fuel lines or something that stall out the engine. Thank God for that hand pump on the lift pump, or else I wouldn't have a starter anymore. I'm always wary now, at any time I feel I'm losing power, I switch back to diesel. I was told it could be the lift pump, but I didn't understand why that wouldn't affect the diesel. Any advice?