Fuel Pressure Regulator
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Wells Vehicle Electronics Fuel Pressure Regulator

Part No. PR121 Warranty Details  
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Wells Vehicle Electronics is a leading global supplier of advanced vehicle electronics solutions for original equipment and replacement applications. Every component either matches or improves on the OE design to ensure fast, easy installation, superior performance and reliability. Wells offers extensive application information and technical support.
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2 Questions | 3 Answers
Displaying questions 1-2
  • Q:

    I have a 1999 Chevrolet Silverado 1500 LS 4.8 8 cyl. Would a Fuel Pressure Regulator Cause This Vehicle Not To Start Properly? What is the normal Lifespan of a Fuel Pressure Regulator? Seems to me that the 1 that is on my vehicle now is losing pressure.
    Also I'm thinking that the MAP Sensor could possibly be defective or the MAF Sensor could be defective as well. Could these 2 Items cause it not to start proper as well and how long do these 2 parts normally last?
    Asked on 1/6/2017 by Cj from Colorado Springs, Colorado

    1 answer



      Hi Cj! Sounds like lots of guessing. A trouble code will guide you to a solution. Fuel pressure regulators should last the life of the vehicle unless they are contaminated by dirty fuel or possibly the wrong fuel such as excessive alcohol in the mix. My first suggestion is to check trouble codes, both current and pending. Next up is to check fuel pressure with a gauge. The specification for this vehicle is 55-62 key on engine off. If the fuel pressure drops quickly when the pump turns off look at the fuel pressure regulator vacuum line. If the pressure regulator is leaking it will be leaking into the vacuum line. The vacuum line should be dry and not smell of fuel. If the pump cannot create 55-62 then you need to check the pump and filter for issues. It is possible a MAP or MAF has failed, but not without setting a trouble code. Trust the on board computers ability to test monitor itself.

      Answered on 1/10/2017 by Solomon from AAP
  • Q:

    What psi is this rated for?
    Asked on 2/22/2015 by Gearhead from Indianapolis, IN

    2 answers



      Happy to answer your question Gearhead! This Fuel Pressure Regulator is rated at 50PSI.

      Answered on 2/23/2015 by Panda from AAP


      I'm happy to help, Gearhead! This Wells Vehicle Electronics Fuel Pressure Regulator (Part No. PR121) is engineered to fit multiple GM V8 engines in vehicles from 1996-2005 and has an operating pressure of 50 psi.

      Answered on 2/23/2015 by Heath, ASE Parts Specialist from AAP
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