I got a friend of mine who just put in a D16a6 in his 91 Civic STD. Hes got pretty much eveything in and ready to go, except for this "thing" that goes on the back of the intake manifold. We dont know what goes in this spot. All we know is that a thick black hose that runs from the brake booster to this spot on the intake... so we know it has something to do with the vacume. If anyone knows what goes in the spot in the picture above, please let me know. Where could I get this "mystery peice" at? Thanks for the help, it is greatly appereceated.

P.S. I am talking about the 3 holes in the pic. Looks kinda like this---> o0o

 

I would like to help but my moniter is taking a shit so I can't see any images...sorry

 

Wow, that sucks.

Are any of the holes threaded or anything?

You could always do like the domestic guys do and start plugging things in until it works right. Or you could see what fits...

Why didn't you read the directions?

-MR

 

if thats a 88-89 manifold dont worry about it Just plug it up its a extra sensor thats worth less

 

I guess we could try plugging it up... it looks pretty important, I mean a thick black hose that runs from the brake boster runs to this spot on the intake. I think it is a 90 intake, but not sure...

 

Maybe just a check spot for the booster? I dont know plug that shit and youll see when you go to stop, just make sure you have a working E brake just in case.... -Ben

 

any body else have a clue?

 

there is suppose to be a sensor there that Ive yet to ever use,it should be threaded,if its not then you can get some honda bond & a bolt & plug it up..
I have a 90 intake mani w/ that sensor still on it if u need it let me know..

 

yea the two outside holes are threaded so i guess since uve gotten by not using it ill prolly just plug it up