Fuel Pressure

At Idle, MAP sensor pressure low, (high vacuum) to regulator 190 - 200 kPa (25 - 30 psi).
At Idle, system pressure controlled to regulator 280 - 320 kPa ( 41 - 46 psi).
Pressure less than 41 psi may set code 44 and vehicle will be undriveable. If pressure drops while driving, the engine will surge and then stop.