Engine Performance - Erratic Running or Stalling

87porsche02

Subject: Troubleshooting Temperature Sensor NTC II
Model

911 Carrera
Group

2
Part Identifier

2462
Number

8709
August 12, 1987
Engine performance problems such as erratic running or stalling may appear to be caused by a malfunctioning temperature sensor NTC II.

In most cases, however, the temperature sensor is not defective. Excessive resistance between the engine and temperature sensor from corrosion or a loose sensor will normally be the cause.

To correct this condition, unscrew the temperature sensor slightly and then retorque to 15 N-m (11 ft. lbs.) using special tool 9222.

For checking temperature sensor NTC II, refer to 911 Carrera DME test plan order number WKD 490 921.