Throttle Body (TBI): Identification

An 8-digit unit identification number is stamped on throttle body assembly. On TBI model 220, number is stamped vertically on front of throttle body, at Throttle Position (TP) sensor side. On TBI model 700, number can be found on TP sensor side of mounting flange. Letter codes are stamped on throttle body at external tube locations to identify vacuum hose connections.