Our r/c 2-stroke engines don't need the pressure line to run. I use to run my 1/10 gas truck without a pressure line all of the time. It made the throttle super smooth and a lot more linear/easier to drive. You need to run a pressure line from the tank's lid and secure the other end of the line (that normally goes onto the pipe) but position so when the car is upside down the end of this lins is above the bottom of the tank so fuel doesn't spil out when you're upside down. The take a 1" or so long piece of tubing, put it on tank with a screw or some plug on the end of it. Richen motor top & bottom between 1/4-1/2 turn and good to go. You do lose the ability to prime the engine/fuel line which can cause problems for re-starting after flameouts. If engine is super hot/vapor lock, it might not start/draw the fuel.