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Author Topic: Fuel purge valve stuck in open state  (Read 2860 times)

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Stu.C

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Fuel purge valve stuck in open state
« on: 06 June 2022, 23:35:23 »
On my X30XE, I've got an unexpected constant vacuum on the charcoal canister side of the purge valve (where the green hose is connected below). Haynes says "the purge control valve is not opened by the ECU until the engine has warmed up, and the engine is under load; the valve solenoid is then modulated on and off to allow the stored vapour to pass into the inlet tract" - but I'm seeing it constantly and don't believe I should be.  :-\


Anyone run into such before? Are those valves cleanable, or is there anything I can try to unstick it? Or do they simply just fail sometimes and it's another thing for the list of 'bits to look out for' ... ?


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Doctor Gollum

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Re: Fuel purge valve stuck in open state
« Reply #1 on: 08 June 2022, 19:49:41 »
Is the correct plug connected to it?

The ecu coolant temp sensor uses the same plug but is 5v not the 12v that the valve uses...
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Stu.C

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Re: Fuel purge valve stuck in open state
« Reply #2 on: 08 June 2022, 22:57:24 »
Quote from: Doctor Gollum on 08 June 2022, 19:49:41
Is the correct plug connected to it?

The ecu coolant temp sensor uses the same plug but is 5v not the 12v that the valve uses...


Yeah  :y  Double-checked it with the wiring colours, then triple-checked it by unplugging the valve and immediately getting a '61 - Fuel Tank Ventilation Valve Voltage Low' code thrown.


Hoiked the valve off the engine and with no power to it you can blow through it freely in either direction. Connected it up to 12V on the bench and nada, zilch, nothing happening. It's deader than a Norwegian Blue ...

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