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Old December 14th, 2011, 09:30 PM   #1
Catnip 0_o
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How to easily make a homemade smoke machine?

Has anyone ever made a homemade smoke machine before to test out evap leaks in their emission system? If so, what did you use to make it and how easy was it? Thanks :)
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Old December 14th, 2011, 09:49 PM   #2
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Those machines are rip off. $1000-3,000 while I am sure somebody could build under $100.
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Old December 14th, 2011, 09:54 PM   #3
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Go buy a party fog machine. The principal is the same.
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Old December 14th, 2011, 09:58 PM   #4
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You are supposed to use pure nitrogen when pressurizing the EVAP system though. Using regular air could be dangerous. Just an FYI.
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Old December 14th, 2011, 10:01 PM   #5
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Unless baby oil turns into pure nitrogen when heated I dont think many of the tool manufactures are doing it right. And how the fukc are you supposed to see a nitrogen leak?
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Old December 14th, 2011, 10:12 PM   #6
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Unless baby oil turns into pure nitrogen when heated I dont think many of the tool manufactures are doing it right. And how the fukc are you supposed to see a nitrogen leak?
You hook the nitrogen tank to the smoke machine to pressurize the system and look for the smoke. You are not supposed to introduce oxygenated air into the EVAP system. Most if not all EVAP smoke machines are either pressurized with nitrogen or have a way to hook a nitrogen tank to them.
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Old December 14th, 2011, 10:22 PM   #7
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So every time I open my gas cap to fill my tank and oxygen enters my tank that's bad?
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Old December 15th, 2011, 12:18 AM   #8
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GREASYHANDS...I like turtles too :)
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Old December 15th, 2011, 06:50 AM   #9
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Quote:
Originally Posted by buttercr125 View Post
You hook the nitrogen tank to the smoke machine to pressurize the system and look for the smoke. You are not supposed to introduce oxygenated air into the EVAP system. Most if not all EVAP smoke machines are either pressurized with nitrogen or have a way to hook a nitrogen tank to them.
WE have been using a Smoke Pro for over 5 years and no issues w/regulated shop air. My opinion is nitrogen is an ultra safe option. A Smoke Pro is only a couple hundred bucks.
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Old December 22nd, 2011, 09:00 PM   #10
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Old December 23rd, 2011, 05:46 AM   #11
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Mopar leak detector uses shop air.

I check all connections, look for damage to the charcoal canister or lines, check the purge solenoid, blow the system out with air and change the gas cap.

You can find most issues this way.
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Old March 16th, 2012, 09:59 AM   #12
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The OPs question wasn't answered, so who does this test on the north side of Grand Rapids? I need to get some things checked out.
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Old March 16th, 2012, 11:30 AM   #13
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You are supposed to use pure nitrogen when pressurizing the EVAP system though. Using regular air could be dangerous. Just an FYI.
I did learn why. Not from experience tho. As the oxygen mixes with the fuel vapors the mixture becomes more volital than just fuel vapor alone. The possibility of a spark or arc in the tank at the fuel pump could cause it to ignite. That is why its recommended to use an inert gas to pressurize the system.
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Old March 17th, 2012, 07:50 PM   #14
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I borrowed a smoke machine from a friend to test my intake for leaks. It had all the attachments included in the kit for checking everything and the only provision for hooking up pressure was from shop air. So, I dont know what to say except shop air seems to shop just fine.
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