Quote:
Originally Posted by truckster
If you want a correct reading you need to connect to manifold vacuum. Generally speaking, the upper ports on the Quadrajet are ported and the lower ports are manifold vacuum. An easy way to tell is to hook up your vacuum gauge and observe it at idle. If it has little or no vacuum you're connected to a ported vacuum source.
Personally, my feeling is that you'll get more accurate information if you connect to the port on the manifold itself behind the carburetor.
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Thanks Truckster, I was thinking to but I have a 2 port tee. Is it ok to splice the 1/4 vacuum tube off that tee behind the carb and run the transmission and the vacuum gauge from that one spot?
Quote:
Originally Posted by vince1
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Thanks Vince, Ill attach a pic of how the carb was set up before I replaced the engine. For all I know it was set up incorrectly.