MATCO MAF SENSOR TESTER NO.280 (MASS AIR-FLOW) MADE IN USA

-MATCO MAF SENSOR TESTER NO.280 (MASS AIR-FLOW) MADE IN USA. TESTS GM AC-DELCO 1985-88 BOSCH 1989-PRESENT FORD 1989-93 EXCEPT "VANE" TYPE CHRYSLER 1984-89 TESTS BOTH ON AND OFF THE VEHICLE TESTS FOR INTERMITTENT OR MALFUNCTIONING SENSOR