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Intake Manifold Question


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I have an '86 GL-10 turbo w/5sp manual and 4WD. Just gave it a third engine. This EA82 is slighlty newer... The only differences are in the manifolds.

 

The intake manifold doesn't have the 3 hose thermo regulator valve at the rear, nor the solenoid valve on top.

I got everything connected and it started but ran really rough while cold, and didn't hold idle well when warm either. I heard a hiss and discovered a fitting at the back of the throttle body. It looks like a perferated bolt, there is no hose barb, its possible one could have been broken off at some point, but it seems awfuly smooth for that. I put my finger over the hole in the fitting and everything smoothed right out. I popped in a threaded plug from an old manifold and it runs fine.

What is this fitting? Does it need a different fix?

I don't have the vac diagram for this manifold. I can't use the old manifold because its cracked.

 

A smaller concern is the connection of the vaccuum line at the air intake. The new engine has a single "L" which connects to the vaccuum line with the flow valve. The old engine had a "T" fitting coming out of the intake with an additional line running to the canister. I left the "T" connection, but I don't think it matters much, right?

I'm not getting any error codes,but I'd like to be a little more sure before I take it out for a road test.

I've pulled a ton of info off this board searching, but this one I have to ask.

Thanks, DasWaff

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