Need Some Help
That's the optispark vent (feed). Without it connected, there is no vacuum to pull air through the opti to vacate the created ozone gas. You also will have a small (probably unnoticeable) vacuum leak. It connects to the intake elbow.
Essentially you just have a non-vented opti.
EDIT: Correction - without it connected you just have a small vacuum leak. Atmospheric air will still be pulled through the opti as long as the other side is connected.
Essentially you just have a non-vented opti.
EDIT: Correction - without it connected you just have a small vacuum leak. Atmospheric air will still be pulled through the opti as long as the other side is connected.
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On The Tree
Joined: Dec 2010
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That's the optispark vent (feed). Without it connected, there is no vacuum to pull air through the opti to vacate the created ozone gas. You also will have a small (probably unnoticeable) vacuum leak. It connects to the intake elbow.
Essentially you just have a non-vented opti.
EDIT: Correction - without it connected you just have a small vacuum leak. Atmospheric air will still be pulled through the opti as long as the other side is connected.
Essentially you just have a non-vented opti.
EDIT: Correction - without it connected you just have a small vacuum leak. Atmospheric air will still be pulled through the opti as long as the other side is connected.
I drilled a small hole in the Fernco just prior to the throttle body and installed it there. I would hook it up. With it hooked up you're sending MAF-metered filtered air through the optispark. While it may not be a big deal to siphon non-filtered air, you want to give the opti the best chance of survival, given its track record. 
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I drilled a small hole in the Fernco just prior to the throttle body and installed it there. I would hook it up. With it hooked up you're sending MAF-metered filtered air through the optispark. While it may not be a big deal to siphon non-filtered air, you want to give the opti the best chance of survival, given its track record.
