How do you find vacuum leaks on 93 s10 blazer?

Visually inspect each vacuum line looking for problems such as being disconnected, cracked, rotted or pinched. If the lines appear to be okay you can run the engine while spraying carb cleaner around problem areas such as at the base of the throttle body and intake manifold area. If while spraying you hear the engine idle change rpms, you have just located a vacuum leak. The gasket between the throttle body and intake manifold were known to blow out and cause a large vacuum leak.
Visually inspect each vacuum line looking for problems such as being disconnected, cracked, rotted or pinched. If the lines appear to be okay you can run the engine while spraying carb cleaner around problem areas such as at the base of the throttle body and intake manifold area. If while spraying you hear the engine idle change rpms, you have just located a vacuum leak. The gasket between the throttle body and intake manifold were known to blow out and cause a large vacuum leak.