Is it the fuel pressure regulator valve?

art1966
Wed, 20 Nov 2024 13:16:03 +0000
Maintenance/Repairs

2004 Camry 4-cyl (2AZ-FE). 163K miles. (In great, well-maintained condition, but parts are starting to wear out.)

Symptom: When starting the engine, it cranks fine, but is taking longer and longer to start. If I shut off and restart, it catches quickly. When starting after a long shut-down, if I wait a bit with key “ON”, engine starts promptly when I turn key to “START”.

My diagnosis: A failing check valve that is supposed to keep the fuel rail pressurized when the fuel pump is not running (i.e., engine off).

Question 1a: Is that right?
Question 1b: Is that what Toyota is calling the Fuel Pressure Regulator Valve?

Question 2: Is there any issue other than inconvenience (waiting for fuel rail to pressurize)? That is, if I don’t fix it will it cause something else to fail?

Question 3: What I’ve found online so far indicates that this part is inside the fuel tank. Does the tank have to be removed to replace that valve, or is there a hatch I have not found yet? (Where; under rear seat?)

Question 4: If it is a big deal to replace the valve, should the fuel pump be replaced as long as we’re in there?

15 posts - 9 participants