I am in the process of putting a motor back in a 89 GTU, and I can't find the routing for this large hose in the vac diagrams/cooling system or engine assembly sections in the FSM or Haynes.

So I am a little stumped. I will take a picture later tonight when I am home, however right now I can only describe it in hopes someone can help....

Ok, where the 5th/6th port actuaters are attached to a manafold. At the BACK of that manafold. (NOT THE SIDE) Coming out of the rear of that manafold there is a large ~1/2" nipple in need of a hose. I know I may have to buy a formed hose from mazda for this this but I need to know where it attaches to so I can find it for the parts guy...

Looking at what I have it looks like it may come out the back of that manafold and route back up to where the metal vac hoses split up and T to the OMP lines. I am not 100% on this, as I can't find a hose that fits the thing. If you look at the coolant hose coming out of the rear iron, then to the left of that on the passanger side there's a big vac nipple coming from that going somewhere....

Anyone!??!?! I will post a picture later if no one knows what im talking about. Im trying to get this guy running this week.

 

Think BRAKES.

 

I thought it was the brake booster too, but its not, it was the split air pipe nipple for the pipe running down to the CAT, I forgot the hose got stuffed under when dropping the engine back in.

I always thought that pipe hooked to the air pump directly... Maybe that was on the S4???

Thanks for the idea though