As mentioned by the previous message, there could be a leak somewhere in the fuel system causing the pressure to drop rapidly after the car is turned off. You will need a fuel pressure gauge to test this.

Also check the fuel injection temperature sensor, also called the coolant temperature sensor. It is the last sensor on the engine, closest to the windshield. Remove the connector, measure the resitance across the sensor terminals - it should be 2.5 to 3.5 Kiloohm at 20 deg-C and should go down to about 250-350 ohm at 80 deg-C. If the resistance does nto change by a factor of about 8 to 10 when engine temp changes from 20 deg-c to 80 deg-c, change the sensor.

The other possibility is the zero position of the airflow sensor plate. But I am assuming that you have not touched this.

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Saumil S. Patel