Fuel pressure in ring main too low at full throttle

• Pull off hose between intake air distributor and pressure regulator
• Measure pressure in ring main with a pressure gauge
• At idling speed (specified pressure 2.5 kg/cm2/35psi)
• At full throttle (specified pressure 2.5 kg/cm2/35psi)



Pressure at idling and full throttle about 2.5 kg/cm2 (35 psi)       Pressure drops noticeably at full throttle       Pressure same at idling and full throttle but too low