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Discussion Starter · #3 ·
hmmm...the little blue plastic vent hose that goes into the intake path is post MAF and pre throttle body so it's already post-maf and shouldn't matter.

I could be (and most likely) totally missing something.
 

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hmmm...the little blue plastic vent hose that goes into the intake path is post MAF and pre throttle body so it's already post-maf and shouldn't matter.

I could be (and most likely) totally missing something.
ALL air introduced into the MAF-controlled GENII engine has to go through the MAF for the fueling to be correct.

Venting the opti to the atmosphere will let the intake manifold pull a small vacuum that bypasses the MAF, therefore causing the same effect as small vacuum leak. (The MAF will under-report the actual amount of air going into the engine)
 

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Check the base of your filter. Mine has a little hole that the opti vent plugs into.
 

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Discussion Starter · #7 ·
checked the filter and found the hole, thanks.

Appreciate the MAF info...realized the flow of air with this vent tube now that I discovered the hole in the filter.

always nice to find the hole :) :D
 

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So you put it in the wrong hole?

Sean
 

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always nice to find the hole :) :D
So you put it in the wrong hole?

Sean

Okay I laughed.

I don't have that intake but when I used a universal boot to the throttle body before I just poked a small hole and put the blue piece in it. I would put it in the boot between the filter and TB.
 
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