I've swapped a TPI in my car and I'm trying to finialize some things.
I can't find clear pics to awnser my questions of how things are supposed to be laid out.
What dose the upper hose from throttle body go to( passenger side). I'm thinking that it should be a coolant passage. Normally when Coolant gose through a throttle body it should have a way to exit it as well and I don't know where that would be in this case. So I'm thinking that maybe its not. I think the lower one (passenger side) is a vacume line. What should that be connected to?
What about the driverside under the actual plenum? There is a Small line comming out of it. I'm thinking that I'll use this to work my vacume Heat/AC controls.
At the rear of the plenum there is 2 vacume lines I've got one hooked up to my Fuel preasure regulator, dose the larger one hook to the EGR Valve?
How should the AC lines run from the compressor. I'm using an 86 TPI setup. It dosen't use the single serpintine belt setup so the AC Compressor is on the driverside. Looks like the lines run through some brackets on the Radiator Fan under the intake tube/sensor. With these lines in this place how should the Upper radiator hose be routed? Under or over the lines. It looks as if it should go under the lines in on top of the support thing from the Top of the fan shroud. The hose that came with my TPI won't line up that well at that point and not at all above it. Just wondering what you opinion is on this. The hose split so I have to get a new one. Maybe the new one will be different.
Sorry I couldn't find anything on this.

 

the port on the passenger side if the throttle body at the top is to cycle coolant trough the throttle body. It exits on the bottom driver side. I would have to look at my tpi to see what the rest of the stuff is for.

 

Thats what I thought but I didn't see the exit though. I'll look again. Where dose it feed from and where dose it return to?

Thanks

 

On the very bottom in the IAC plate. It has a front and side port.... That is what the coolent goes thru. Most leave that un-hooked. I am 100% sure on this.

On the pass side of the TB. One of them(forget which) goes to the valve cover as a breather.

The other runs back under the tb and IIRC goes to the purge system. (I'm unsure on this).

I never did find anything on the tiny vac port under the throttle body. I do know it is "dead" at idle, but then has vac on it during peddle movement.

 

Re: Vacuum lines Autozone.com has them online. Their '87 one is actually an '88, but it's right other then the evap canister being on the wrong side.

Maybe this will help?

 

Apparently I'm loosing my mind. I found a vacume scematic on chevythunder.com