I put a new engine in my 90 iroc this past spring, went carb with it. Now what do I do with the vacuum lines that feed the vent-ac controller? I found the 2 on the outside that were fed by the other engine, but I did away with all the smog and tpi stuff. What can I hook these to, or what am I missing?

 

HVAC hooks to full-time manifold vacuum. The port for the brake booster is an acceptable location for a T-fitting.

 

.....or there could be a port in the manifold that is plugged. Remove the the plug and install the appropriate fitting. I've seen some that looked like a small freeze plug but were in fact in the vacuum stream.

 

as stated, the inlet gets full manifold vacuum. the other hose goes to the heater diverter valve. if you got rid of that too then you just cap the other line off.

 

Thanks for the replies, so if I got rid of the diverter valve, which I did. the line I need to cap is the one with a straight hose fitting? The other line I see has a 90' hose fitting on it.

 

im pretty sure the one with the straight fitting is for the diverter.

 

Thanks guys I got it fixed with your help. Also thanks to the mods for letting this topic ride here. But I figured it was a question that most carb guys could answer, even though it was a hvac question it was carb related.