Po442 
Po442
means you have a leak some where, could be your gas cap being loose, your evap vent solinoid be F'd up, a crack in one of the plastic hoses. Smoke testing the evap system is one of teh ways to find your leak, but you need a Tech 2 to seal the and purge the evap system.
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ok where is the evap vent solinoid located?
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vent solenoid is back by the tank, has a 2 wire connector you can close off the solenoid with any good scan tool that has bidirectional controls. You will need a smoke tester though. Your tuner could kill the light for that code if you want.
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someone told me about a solenoid by the intake?
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From: fresno
you should have a test port with a green cap on it specifically for testing the EVAP system. Introduce smoke into the system, wait a minute or so and look for leak with a flashlight in engine bay and under car. You should also hook it up at the filler, there are adapters that allow you to smoke the gas cap and tank, pump seals etc.
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you should have a test port with a green cap on it specifically for testing the EVAP system. Introduce smoke into the system, wait a minute or so and look for leak with a flashlight in engine bay and under car. You should also hook it up at the filler, there are adapters that allow you to smoke the gas cap and tank, pump seals etc.
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From: fresno
well you do it with the car off. As far as i know smoke machines generally pump the smoke in at 1 PSI or less, as soon as the car starts the smoke is pretty much gone, it doesn't mix with the gas or anything like that. Can't really think of any ways it could hurt performance. I guess you could say its like mixing food dye into water, changes the way it looks but nothin else.
Thread Starter
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well you do it with the car off. As far as i know smoke machines generally pump the smoke in at 1 PSI or less, as soon as the car starts the smoke is pretty much gone, it doesn't mix with the gas or anything like that. Can't really think of any ways it could hurt performance. I guess you could say its like mixing food dye into water, changes the way it looks but nothin else.
