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The way the evaporator canister purge valve works is that with the engine off it is open. That is, if you sucked on the line from the canister you would get a mouthful of gasoline vapor (yuck). As soon as you turn on the ignition--the engine doesn't need to be running--voltage is supplied to the valve and it closes. If sucked on the line from the canister you would get resistance. The valve is opened by the engine computer to purge the canister sometime during the operating cycle when the extra air won't stall the car.
To check the valve, first check the electrical connections, then the resistance of the valve coil. If the coil is open, the valve is bad. With the valve connected, listen for the click when you turn on the car. Finally, do a vacuum pull on the valve with ignition on. There should be no vapor flow.
Hope this helps.
Posts in this Thread:
- Check Engine Light - Test Box?, Eric Gunnar, Sat, 12 May 2001 18:32:09
- Found it, but now have the following check engine codes..., Eric Gunnar, Sat, 12 May 2001 20:22:11
- Air leak, Gene N
, Mon, 14 May 2001 07:47:33- Re: Air leak, Eric Gunnar, Mon, 14 May 2001 18:43:50
- Re: Air leak, Gene N
, Tue, 15 May 2001 07:15:03 <-- Viewing This Message
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