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How many sensors are there on this car

(1991 Pontiac Bonneville)
in McAlester, OK on January 23, 2011
i replaced the cam sensor, the O2sensor and the maf sensor and the meter. when i put the wiring back into the maf it stalled out and acted like it was going to die. i unplugged it again and it ran great. is there another sensor that i need to check or should i leave it unplugged
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