? Accurately diagnose fuel delivery problems with this advanced tester including faulty fuel pumps, pressure regulators, fuel lines, check valves, and fuel filters. ? Make connections quickly and easily using S.U.R.&R.-exclusive Quick Connect adapters with thumb release, push button convenience. ? Extra-long, 9ft. hose included for ease of use inside vehicle cabin. ? Unique gauge cover features suction cup back for attaching tester to window during drivability testing. ? Relief valve included for fuel flow testing. ? View aerated fuel through transparent line adapters. ? Most user-friendly test on the market.