Where does the transmission vacuum line go?
If the truck has a vacuum hose to the transmission (to the vacuum modulator), the line will be a metal tube attached to the large tube that the transmission dipstick is in. It will come up and connect to a hose that will run to the base of the carburetor.
Where does the th350 vacuum line connect?
In case you are still uncertain on where to hook up vacuum line: There is usually a port directly behind the carb. on one of the intake runners. If not there is the port on the bottom backside of carb. (usually for power brakes), or on the front of the carb.
Can you drive without a vacuum line?
No, it will not run properly, however , it will run. It will allow extra air into the intake manifold which will cause the engine to run with a leaner gasoline mixture which burners hotter.
What causes poor engine vacuum?
Low vacuum can be caused by low compression, intake leak or tight valves. The gauge needle bounces around a lot-uneven compression if the vacuum reading fluctuates within the normal range.
What is checked with a vacuum gauge?
A vacuum gauge shows the difference between outside atmospheric pressure and the amount of vacuum present in the intake manifold. The pistons in the engine serve as suction pumps and the amount of vacuum they create is affected by the related actions of: Pistons rings. Valve train. Ignition system.
How a vacuum control device is tested?
Doing The Vacuum Test: Connect the vacuum gauge hose, as close to the intake manifold as possible and start the engine. Run the engine long enough, to reach normal operating temperature. Note the location and action, of the vacuum gauge needle.
How do I set the timing on my vacuum gauge?
Get a vacuum tester and put it inline with manifold vacuum. Advance the distributor until you get the maximum amount of vacuum reading on the gauge. Then turn the distributor back exactly 1 degree on the vacuum gauge. Tighten everything down and adjust your idle if necessary.