Fine tunes carburetors and timing peak for maximum fuel economy. Easy-to-read face. Includes hose and adapters. Reads 0–30 inches vacuum and 0–15 PSI Checks fuel pump pressure Checks mechanical condition of the engine Checks vacuum control system function Checks for leaks in the intake manifold, manifold and head gaskets, piston rings, valves and vacuum lines Includes hose and adapters