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Inspection/Maintenance (I/M) Complete System Set Procedure
Description
The purpose of the I/M Complete System Set Procedure is to satisfy the enable criteria necessary to execute all of the I/M readiness diagnostics, and complete the trips for those particular diagnostics. When all diagnostic tests are completed, the I/M System Status indicators are set to YES. Perform this test when more than one or all of the I/M System Status indicators are set to NO.
There are a few methods floating around, but this is the one used by GM techs (OBD1 method).
Reset ECM by pulling ECM fuse (underhood) for a few seconds.
With A/C turned off, start car and immediately put it in Drive
with your foot on the brake. If the car does not start initially,
keep trying WITHOUT putting your foot on the accelerator.
Idle the vehicle in Drive for autos and neutral for manuals until the coolant fan has cycled on then off for one minute.
This is a how-to on installing a heated oxygen sensor into your car. The benefit of a heated oxygen sensor is that your car will go into closed loop much quicker, which means the ECM is adjusting your fuel based off of the sensor and not maps. By doing this your car will run better quicker on cold start-ups. It will also improved fuel consumption during start up, as well as reduce emissions.
First, you will need to get a 4-wire heated O2 sensor with the pig-tail.
