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Fuel System Pressure Test

WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2001 Pontiac Montana, 2001 Pontiac Aztek, 2001 Oldsmobile Silhouette, 2001 Oldsmobile Bravada, and 2001 GMC Sonoma. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: For fuel pump circuit testing, see appropriate diagnostic procedure under NO-START DIAGNOSIS .
  1. Turn ignition off. Install "T" adapter and pressure gauge at injection pump. Start engine and measure fuel pressure.
  2. If fuel pressure is not 4 psi (.28 kg/cm2 ), check fuel lines and fuel tank sending unit for restriction. If fuel lines and sending unit are okay, replace fuel pump.
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