Home Auto Repair How to Check the Fuel Delivery on a Subaru Outback

How to Check the Fuel Delivery on a Subaru Outback


The Subaru Outback debuted in 1995 in sedan and station wagon SUV crossover variations. The Outback is an all-wheel drive, mid-sized vehicle. If your fuel delivery system is giving you problems, you can fix it yourself. Check the Subaru Outback fuel delivery system if the engine runs rough, stalls in traffic or won’t start at all.

Check the Fuel Delivery

Relieve system pressure by loosening the gas cap to allow pressure to escape and detaching the connection to the fuel pump relay. Start the engine and let it run until it stalls, then turn the ignition off and disconnect the negative battery cable.

Disconnect the fuel pressure sensor vacuum hose. Check for fuel in the line. If there is fuel present in the line, the fuel delivery problem is likely a faulty fuel pump pressure regulator. If there is no fuel in the lines, reattach the vacuum hose and continue with the fuel delivery diagnostic.