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Eric, Automotive Repair Shop Manager
Category: Chevy
Satisfied Customers: 31905
Experience:  20+ yrs. experience as repair shop manager and technician.
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where is the fuel pressure regulator located on a 2001 S10

This answer was rated:

where is the fuel pressure regulator located on a 2001 S10 LS 4.3 motor ,4 wheele drive,csefi



The fuel pressure regulator is located beneath the upper intake plenum.


  1. Properly relieve the fuel system pressure.
  2. Disconnect the negative battery cable.
  3. Remove the upper intake manifold.
  4. Remove the fuel pressure regulator retainer clip.
  5. Twist and pull the fuel pressure regulator in order to remove the regulator from the housing using a shop towel to catch any spilled fuel.
  6. Remove and discard the regulator seal O-ring.
  7. Remove and discard the regulator filter.
  8. Remove and discard the regulator seal O-ring.
  9. Remove and discard the backup ring.
  10. Cover the fuel pressure regulator housing to prevent contamination from entering the fuel system.

    Click image to see an enlarged view

    Fig. Fuel pressure regulator assembly location (6)-4.3L engine


To install:

  1. Lubricate the NEW O-rings seals with clean engine oil.
  2. Assemble the following NEW parts to the fuel pressure regulator:

    Backup ring Regulator seal O-ring Regulator filter Regulator seal O-ring
  3. Install the fuel pressure regulator with the vacuum tube pointing down.
  4. Install the fuel pressure regulator retainer clip (5).
  5. Install the upper manifold.
  6. Tighten the fuel filler cap.
  7. Connect the negative battery cable.
  8. Inspect for leaks.
  9. Turn the ignition switch ON for 2 seconds.
  10. Turn the ignition switch OFF for 10 seconds.
  11. Turn the ignition switch ON .
  12. Inspect for fuel leaks.






Customer: replied 7 years ago.
do you think that this is my problem???



Either the fuel pressure regulator is bad, or the poppets on the spider fuel injector are leaking. You will know if they are when you pull the upper intake manifold as it the surface of the lower intake will be wet with gas. If this is the case you will need a new spider injector system, which costs about $350. If surface of lower intake is dry then you just need to replace the regulator. Make sure you replace the o-rings as well, which should come with the regulator.

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