Pickup 4WD L4-1949cc (G200z) (1988)
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Throttle Position Sensor: Description and Operation
Electric vacuum switches are connected to the ECM and sense vacuum, allowing the ECM to differentiate between idle and off-idle throttle operation.
Isuzu Workshop Service and Repair Manuals
Vacuum Switch >
< Throttle Full Open Switch|Locations|Page 494
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