Installed a new high flow/high pressure fuel filter. Engine was cutting out at high load. Had a cheap wix filter installed with priming bulb upstream of the fuel pump. Removed that, and put the high flow/pressure Summit Racing fuel filter downstream of the fuel pump. The engine no longer cuts out, and it seams this has helped get rid of air that was running through the pump. The fuel pump now runs much quieter an is likely much happier.