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Senior Member
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Join Date: Aug 2004
Location: Northern VA
Posts: 1,944
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Senior Member
Join Date: Aug 2004
Location: Northern VA
Posts: 1,944
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What are the symptoms that led you to believe that you have fuel pressure issues? No start issues, stalling, power loss, etc
The T4R is more difficult to diagnose fuel pressure issues as there is no pressure test port on the fuel rail; as there are in many vehicles. Without it then you are guessing. The cheapest speculation would be to replace the pressure regulator. If that does not solve it then I would personally replace the fuel pump. There is a pulsation dampener but that thing is confusing to me. Why is this needed if the pressure regulator is functioning correctly?
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2003 4x4 Sport 4runner V8 with 287k miles and counting
2015 Lexus RC350 F-sport
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