Ok I'm trying to get my 800 efi running it has spark good compression the fuel rail pressure is good when I primed the fuel pump with a small battery. But it won't start and the fuel pressure drops to like 20-30 when I start pulling it over and have the fuel pump plugged into he power from the sled. I also unplugged the fuel pump and put battery power to it with good fuel pressure and it still won't start. What is the issue? Any ideas would be great.