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Speedy Squirrel Speedy Squirrel is offline
Rocket Scientist
Join Date: Jun 2008
Location: Detroit
Posts: 938
Just FYI, pulling the relay for the rear fuel pump (Fuel Pump Relay II) disconnects power to the Warm-up regulator, throttle bypass valve, and the O2 Sensor.

Might want to arm yourself with the workshop manuals. Check voltage from the O2 sensor. Should be between 0.1V and 0.95V.

Check pulsewidth (need a meter that can do that) at the rubber diagnostic plug by the CDI box in the back. Should be 45 to 55% between Pin A and ground.
Old 01-23-2013, 03:39 PM
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