Question about Lexus LS 430

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Gas valve solenoid

When I first start my car I can hear a loud rumbling coming from the gas tank located behind the back seat, also when I unscrew the gas cap, "tremendous!" Amounts of pressure blows out from around the gas cap, I heard this could be a bad purge valve? If so where on the car is it located?

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The gas tank is pressurized to about 7 PSI and after that the pressure relief in the gas cap lets go so the condition you describe may be normal or you need a new gas cap.. So you may just be hearing the fuel pump run and it is defective if it is that noisy.

Posted on Mar 27, 2014

Testimonial: "Thanks the advise, but I have replaced the cap,when say tremendous amount of pressure, I mean at gas station people come running to see what happening! While I'm taking the cap off"

  • Stephen runyon
    Stephen runyon Mar 27, 2014

    I have replaced the cap but it has not worked, pressure is much more than 7lbs people come running at the gas station because it is loud when taking off the cap

  • yadayada
    yadayada Mar 27, 2014

    You should have mentioned all parts replaced. I think you had better see the dealer on this asap.



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SOURCE: I'm replacing a purge valve solenoid that is

Follow the lines off the vapor canister one of them runs to the solenoid.

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sad to say that you miss on what you did, dtc P0449 was related to vent solenoid contol circuit, purge problem indicates P0443,, check the vent valve connectors supply voltage from the power distribution box, (fuse # 14-tcm/batt) and the other wire(almost white) to ecm C1 #61.

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SOURCE: I can't locate the canister

{: ) Top right center of the engine, near the fuel injector connector.


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SOURCE: 2003 Mitsubishi Eclipse has a

There is a purge valve and solenoid on most cars I believe. The purge valve is usally located by the engine and the selenoid is usally located by the fuel tank. Call up or go visit your dealer and you will be able to order the parts from them and they can tell you the exact location.

Posted on Aug 09, 2011

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