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Home >> BMW >> 1982 >> 633CSi Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> BMW MOTRONIC Emission Control System >> Testing >> Test 1: Fuel Pressure >> Fuel Pressure Too High
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Fuel Pressure Too High

  1. Check the vacuum connection of the fuel pressure regulator and vacuum hoses for leaks or kinks. Repair or replace as needed.
  2. Check for defective pressure regulator and replace if faulty. Check the fuel return line for bends, pinches or clogs. Repair or replace as needed.