5.0L 4-Bbl. Cadillac Brougham I

1. Without separating connector, connect a high impedance digital voltmeter from TPS connector center terminal "B" to bottom terminal "C." Turn ignition on with engine off.
2. Disconnect idle solenoid connector and ensure that throttle lever is against idle speed screw. Voltage reading should not to exceed .7 volt. If voltage is incorrect, adjust TPS voltage by removing plug covering TPS adjustment screw.
3. Using a 5/64" drill bit, drill a hole 1/16-1/8" (1.6-3.2 mm) deep in plug covering TPS adjustment screw. DO NOT damage screw head. Start a 1/2" long No. 8 screw in drilled hole, seating only enough for good thread engagement. Using a screwdriver, pry against screw to remove plug. Discard plug.
4. Using TPS Wrench (J-28696 or BT-7967-A), adjust TPS screw to obtain .50-.58 volts. Install new plug to seal setting after adjustment. Clear ECM memory if diagnostic code was set during adjustment.

Scheme 7