[Guest]

My shop manual is in my new residence and my car is at the old one with me.

The car is missing and sometimes seems like it wants to stall but then comes back to life. I just put a rebuilt carb on so I suspect I introduced a vacuum leak in the process.

Where do I connect a vacuum gauge (289, 2V stock everything) to take a reading and how much should it read?

Thanks for the help.


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[Opentracker]

Hook it to manifold vacuum. Not the lead that goes to the distributor.
The reading should be 16-20 and it should be steady, not jumpy.

 

[sharkfin]

Here is an old trick I use to find vacuum leaks. With the engine running, spray carb cleaner at your vacuum connections. If there is a leak, the pitch of the engine will change as the leak sucks in the carb cleaner. I would start by checking the area where the carb mates to the intake manifold. If you have power brakes, check the hose connecting to the booster. Good Luck!

1966 Coupe - GT - 4 speed
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[68390gt]

You can also use propane - the engine will suck the propane through the leak and burn it increasing the RPM. Its heavier than air so it won't get accidently drawn into the carb. Use a piece of rubber hose to direct the propane along the gasket mating seam and keep the can verticle.