New to the forum, so apologies if this is in the wrong spot. I just put a new long block in my 87 4runner, and used the original intake. It will fire up, and run on carb spray, but dies out quickly. I found a massive vacuum leak, but I have not been able to find how to fix it. It's a small port underneath the cold start injector and for some reason I haven't seen it on any diagrams. If anyone can help identify this it would be greatly appreciated. Thanks in advance!
-Goose

 

The hose that goes to that port runs straight down and connects to the back of your idle air control valve (IAC) under the intake manifold
the part# for the hose should be 22234-35010. But please confirm the application before ordering/buying.

 

That makes so much sense, thank you. I'll try connecting it with a piece of hose and see if that works.