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Old 02-23-2015, 07:36 PM #1
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Anyone running an oil catch can with meth injection?
I'm wondering if anyone else is running an oil catch can along with a water/meth injection?
I have an 02 4runner supercharged / 7th injector / Water-meth injection.

The problem I'm having is my catch can is filling with water/meth. I am emptying the can every two weeks with mostly meth!

Anyone else having this issue? I can't figure out why this is happening.
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2002 4runner limited (supercharged) 7th Injector / Water-Meth Injection
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Old 02-23-2015, 07:58 PM #2
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I think I found the answer:

Any pressure in the intake causes flow in the opposite direction. This could occur during an engine backfire or if the engine is turbo-charged. The PCV valve can act as a check-valve in these situations. By closing the PCV valve, any positive pressure or fuel vapor is prevented from entering the crankcase. Even a very small amount of positive pressure can force oil passed gaskets and seals and blow gaskets out of place. Failure of the valve to seal positive pressure may damage the engine.

What happens if I remove the catch can????
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