Patent ID: 7694554

Claim:
An engine misfire detection probe comprising: (a) a first Venturi tube having a first end and a second end, at least a portion of said first Venturi tube seated on a base along the length of said first Venturi tube, said base comprising a sensing chamber, said base adapted to be removably affixed to an exhaust pipe of an engine such that at least said first end of said first Venturi tube is placed in the exhaust stream of said exhaust pipe; (b) a sensing tube, at least a portion of said sensing tube located within said first Venturi tube, said sensing tube adapted to be coupled to an exhaust sensor; (c) wherein said base further comprises a sensing chamber, said sensing tube comprising a first end located outside of said first Venturi tube and a second end located within said sensing chamber, said first end closed and said second end open; and (d) further comprising a tubular fitting having a first end connected to said sensing chamber and a second end connected to a sensor connection hose, said sensor connection hose connected to said exhaust sensor.