Rides fine for a little while but then begins to surge at 3/4- full throttle. Pull back to neutral for a few seconds then takes off like a rocket for 20-30 seconds then repeat! I have cleaned fuel tank, replaced all lines and replace vst with new high pressure fuel pump. I know I need a fuel pressure gauge on it but having a hard time finding banjo fittings . Hard to believe it is fuel related since everything is new but I am lost! Hard to test because it is so unpredictable.