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Home >> Chevrolet >> 1988 >> Spectrum Express >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System >> Testing >> Fuel Pressure >> Low Fuel Pressure
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Low Fuel Pressure

  1. Apply battery voltage directly to fuel pump connector with jumper wires. If pressure is normal, check pump circuit and relay. If fuel pressure remains unchanged, check for restrictions on intake side of fuel pump.
  2. Restrictions in intake hose may cause abnormal vibrations in hose. Remove restrictions as necessary. If no restrictions are found, replace defective fuel pump and/or pressure regulator.
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