Im having an issue with me 2001 blaster cutting out at speed, acts like it runs out of fuel. i have checked the fuel shut off and noticed that in the on position it doesnt flow as well as in the reserve position. I tried running with it in the reserve position and I get the same result. I can make it down the block before it wants to die. If I let it idle a bit I can make it back to where I started, but if I run at speed for any length of time it will quit. Anyone have any suggestions?