Deceleration Fuel-Cut System

Connect a tachometer to engine (to monitor needle fluctuations). See ADJUSTMENTS article in this section for tachometer attaching points. Start engine and warm to operating temperature. Ensure A/C and other accessories are off.
Unplug throttle position sensor connector from throttle position sensor. Short terminals IDL and E1 (or E2) on wire side of connector. See Fig 1 and Fig 2.
Gradually raise engine RPM. Fuel-cut operation can be checked by noting the fluctuation of tachometer needle. Fluctuation indicates fuel-cut system is being turned on and off. See Fig 3. Check that fuel-cut points and fuel return points are within specifications. See DECELERATION FUEL-CUT & FUEL RETURN RPM table.

DECELERATION FUEL-CUT & FUEL RETURN RPM

Fig 1: TPS Sensor Connector Terminal ID (1.6L & 2.2L W/O ECT)

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Fig 2: TPS Sensor Connector Terminal ID (2.0L & 2.2L W/ECT)

Fig 3: Identifying Needle Fluctuations for Fuel-Cut RPM Test