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Home >> Suzuki >> 1991 >> Samurai JS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Fuel System >> Fuel Delivery >> Fuel Pressure Regulator
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Fuel Pressure Regulator

  1. Regulator is mounted to throttle body, above TPS.
  2. Start and idle engine. Disconnect vacuum hose from regulator. If vacuum is present, go to next step. If no vacuum is present, check for blocked hose between regulator and intake manifold.
  3. Check fuel pressure with engine running and vacuum hose connected to regulator. Disconnect vacuum hose from fuel pressure regulator. If fuel pressure does not increase, replace fuel pressure regulator.
NOTE: For fuel system pressure testing and specifications, see BASIC TESTING article in the ENGINE PERFORMANCE Section.
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