I recently had an engine (IO-320) rollback which I determined was caused by low fuel pressure on my AFP fuel injection system. Turned on the electric boost pump and got the engine back. Diagnosis: Failed engine driven high pressure fuel pump.
Pulled the fuel pump off the engine today. The lever inside the pump appeared to be at the full up position and could not be moved. In a low pressure pump, the lever can be moved by hand. Does anybody have any experience with a high pressure pump? Should the lever be moveable by hand?
Second question: If the lever (and the pump) is jammed, can there be damage to the cam in the accessory section? If so, how can the damage be determined without pulling the accessory section off? The pump lever showed no signs of excessive wear.
Charlie Brame
RV-6A N11CB
San Antonio
Pulled the fuel pump off the engine today. The lever inside the pump appeared to be at the full up position and could not be moved. In a low pressure pump, the lever can be moved by hand. Does anybody have any experience with a high pressure pump? Should the lever be moveable by hand?
Second question: If the lever (and the pump) is jammed, can there be damage to the cam in the accessory section? If so, how can the damage be determined without pulling the accessory section off? The pump lever showed no signs of excessive wear.
Charlie Brame
RV-6A N11CB
San Antonio
