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MAP sensor guru's...help?

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Old Dec 25, 2009 | 02:59 PM
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dsertdog56
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Originally Posted by Sheriff420
the evap purge solenoid works like a check valve, pull it off and try to blow through it. if it doesn't plug up one way then its stuck open. don't hold me to it though, thats what i read on another thread.

when my truck is running, my evap purge solenoid has a constant clicking noise and you can feel it clicking if you put your finger on it. i assume that its normal because i don't have a long starting issue or gas fumes. and i believe that clicking noise is the solenoid opening and closing to allow the gas fumes to flow into the intake in short bursts.
That's an excellent description of how it works...I'm gonna have to figure out which is the test port.
My bad, the test port has a cover on it that the smog guys can hook into to run a test the evac system. I need to find out how much vacum to use. The smog guys do a leakdown test.
The first thing to find out is if it's clicking...

Thanks for the help!
 
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