I am in the process of re-installing my intake and all of it's parts and have a part that I do not know where it goes.

If you look at the engine from the front of the car...on the left valve cover there is a breather hole. I need to know where the other end of the breather tube attaches to.


88' Pontiac Trans Am GTA
350 TPI

 

it comes up out of the valve cover, gets a 90 degree rubber elbow to point it forward, hooks to a longer metal tube and has an S shaped rubber hose that hooks to the throttle body on that same side of the engine.

 

I also have another connectivity problem...

Whomever owned my car before me put in a replacement TPI 350 because his first blew up. On the throttle body there are 3 large hose connections on the left side and one on the bottom.
2 of the three on the left side I have figured out....(the top and middle)...but the left bottom and the one on the bottom of the throttle body are supposed to be for coolant...but I have no hoses and there weren't any there when I got the car. Where do these go to ?

 

I also have another connectivity problem...

Whomever owned my car before me put in a replacement TPI 350 because his first blew up. On the throttle body there are 3 large hose connections on the left side and one on the bottom.
2 of the three on the left side I have figured out....(the top and middle)...but the left bottom and the one on the bottom of the throttle body are supposed to be for coolant...but I have no hoses and there weren't any there when I got the car. Where do these go to ?

 

The lower tubes for the coolant will not be needed. Leaving them disconnected is actually good for a couple ponies.

 

Ya...I left them off...no need to change so that I lose power.... But I thought I had to route the two lines together not just leave them disconnected....but whatever works.

Thanks Powerlover and Morley....she's runnin' good...will test drive her tommorow.

 

Did you need to connnect those two coolant lines?
Also im haveing sort of the same problems, the guy before me took some of those hoses off the throttle body and I'm trying to figure out what all the TB connections are for, cant find it in the manuals i have, he had the coolant bypass hooked up and so he put JB weld in the fittings... jeez so I guess those are the ones for the coolant
any help would be appreciated
thanks
tim

 

It has been awhile, and I dont have my car to look at right now, but I know that I left those coolant hoses off and it runs fine. Let me know if you are having any other problems or need to know any other connections.... I might be able to help you out.

 

when you can just check out what all the throttle body connections are for and where they should connect to
thanks for any help
tim

 

Here ya go... straight from the GM service manual!

argh... or go here-->
http://brazen.i8.com/TPI.gif
Jim

 

is the 92 one the same?
i have three hose connections one left hand side?
i see one is for the breather grommet and ones for the coolant bypass, but i have a third one, do you what that ones for

thanks for the help
tim

 

not sure if my 87 is the same as your 92, but the other one on my TB goes to the vapor canister near the driver side headlight