99 head in NA, Intake Manifold vacuum lines
 

I just wanted everyone to give me a quick run down of the vac. line connections. I want to make sure everything gets connected or plugged appropriately.

I should have labeled them better for discussion purposes. Lets reference the ones with ?????? as left, middle, and right.

https://www.miataturbo.net/picture.p...pictureid=1029

Subscribed, I'm kind of curious too if I can use any of those forward nipples for a source.

It seems like anything that needs a vac signal can use the manifold (turbo stuff not included) . The BOV can be sourced from manifold, MAP signal teed into FPR vac signal (which comes form manifold I believe). Every other not used port needs to be blocked off.

I'm not sure all those ports are just vacuum, particularly near the throttle body.

The lower middle ??????????????? nipple worked well for EGR on my 99 motor. Until I dumped EGR that is. On my stock 2001, it's the VICS signal hose.

The rear upper ????????????? is for cruise control.

The front ??????????? hose is used for the exhaust boost sensor. That's part of the EGR system.

Thanks