Nikki carb vacuum routing, help!

Malkovich

Hi all, much enjoying the new forums! Please can someone confirm if my understanding of this vacuum hose routing is correct? Pic is of the idle mixture screw, '89 B2200, manual trans. Using my colors in the pic:

Red: carburetor primary main. Goes to the high altitude compensator.
Gray: should be capped? Not sure if this should go to anything.
Blue: intake manifold. Goes to the topmost port of the vacuum control valve.
Teal: carburetor secondary venturi. Goes to the vacuum control valve.
Yellow: carburetor primary main. Goes to the high altitude compensator.

And yes, I've gone through the service manual and vac diagrams (which is a bit ambiguous on this part). And yes I know that a Weber is preferable! Thank you in advance.

DGonz

For what it's worth, I don't have Grey or Blue on my 1986 B2000. They just don't exist in my engine. I saw a video where Mitch was installing the EGR Delete plate and he recommends just putting a cap on grey and blue.

And since removing my EGR and changing my air cleaner from the stock one, I've also but a cap on yellow and teal. Engine is running fine, if a bit rough and a bit rich, but that's because it's a lot more responsive and I'm not quite used to that.

MazdaMitch

That Nikki carb will always run a bit rich with everything removed.
When I did all the delete stuff on the stock carb, it's just to run temporary until you can get a Weber carburetor.

One hose at the base of the carb should go to the distributor advance.