Mitsubishi Eclipse 1990-1998 Repair Guide

Fuel Pressure Regulator

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REMOVAL & INSTALLATION



See Figure 1

  1. Properly relieve the fuel system pressure as outlined earlier in this section.
  2.  
  3. If necessary for access to the regulator, disconnect the PCV hose from the valve cover. On 1.8L engines, also disconnect the breather hose at the opposite end of the valve cover.
  4.  
  5. Remove the vacuum hose from the fuel pressure regulator.
  6.  
  7. Disconnect the fuel return hose from the pressure regulator.
  8.  
  9. Remove the fuel regulator retainer bolts or remove the retaining snapring, then remove the fuel regulator from the fuel rail.
  10.  



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Fig. Fig. 1: Lightly coat the new regulator O-ring with clean engine oil before installing it to the fuel rail

To install:
  1. Replace the O-ring on fuel pressure regulator with a new one and coat it lightly with clean, thin oil.
  2.  
  3. Insert the regulator straight into the rail, then check that it can be rotated freely.
  4.  

If it does not rotate smoothly, remove it and inspect the O-ring for deformation or damage.

  1. When properly installed, align the mounting holes. If equipped, install and tighten the retaining bolts to 8 ft. lbs. (11 Nm). If equipped, install the regulator retaining snapring.
  2.  
  3. Connect the fuel return hose to the pressure regulator.
  4.  
  5. Install the vacuum hose to the fuel pressure regulator.
  6.  
  7. If removed, connect the PCV hose to the valve cover. On 1.8L engines, also connect the breather hose at the opposite end of the valve cover.
  8.  
  9. Connect the negative battery cable and pressurize the fuel system. Inspect for leaks.
  10.  

 
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