Wagoneer L6-242 4.0L VIN M FI (1988)
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Plug transducer port (8).
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Apply 1-2 pounds air pressure to transducer port (10) to simulate exhaust back pressure. Air pressure can be applied with a handoperated air
pump, compressed air, or lung power.
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Apply a minimum of 12 inches vacuum to port (9).
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Replace the solenoid if will not hold vacuum.
Gearboxes Speedometer Gear Application
