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Home >> Mazda >> 1997 >> MX-5 Miata Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Emission Systems & Sub-Systems >> Exhaust Gas RECIRCULATION (EGR) System >> EGR Valve

EGR Valve

Warm engine to normal operating temperature and operate at idle. Disconnect and plug vacuum hose at EGR valve. Engine should run smoothly. Connect vacuum pump to EGR valve, and apply vacuum. Engine should run rough or stall. If engine does not operate as specified, replace EGR valve.

EGR POSITION SENSOR RESISTANCE

Terminals (1) Ohms W/O Vacuum Applied (1) Ohms W/Vacuum Applied
A & B 2700 2700
A & C 500 2700
B & C 2400 100
(1) Specification listed is approximate.
Fig 1: Testing EGR Position Sensor (Typical)
G93I80752Courtesy of MAZDA MOTORS CORP.