IA Status: Davidg, Do you leave your fitting in or do you plan to? Can you run like that? I also had to get two different sized hoses. Uncovering more or less of the slot can cause off-idle stumble problems.
The only way to spot this problem is to remove the carburetor and see if the throttle blades uncover more than 0.
Use a Vacuum Gauge to Troubleshoot Your Car's Mechanical Problems
I'm wondering how to an engine drivetrain - duration: If you are installing a vacuum gauge inside of the vehicle, mount the gauge according to the manufacturer's instructions. The best way to accurately set idle mixture is to use an emission-test machine to read hydrocarbon HC and carbon monoxide CO levels. This is used to collect data on traffic to articles and other pages on our site. It'll respond better to minor fluctuations in vacuum produced by leaking valves and weak spring valves, for example. Doesn't seem to work with this one.