Porsche 912E Technical Manual

2, 2 TABLE OF CONTENTS 1.0 Introduction to L-Jetronic Fuel Injection 2.0 L-Jetronic Fuel Injection Theory of Operation 3.0 L-Jetronic Component Identification 4.0 Operating Conditions 5.0 Troubleshooting the Porsche 912E Fuel Injection System 6.0 Component Locat…

13, 13 Fuel Injection Valves 1. Verify the operation of each injection valve by disconnecting the electrical supply to each injection valve, one at a time and determine if the engine speed drops when the valve is disconnected. 2. If the speed drops, the valve is defecti…

9, 9 Failures in the L-Jetronics fuel injection system can be categorized into five major categories. The components associated with the potential failures are identified and measurements are provided which will allow the verification of each component’s operating condition. Please refer …

8, 8 provides good acceleration response. If sudden acceleration is required during the warm up phase of the engine, the acceleration enrichment provided by the over-swing of the sensor flap may not be sufficient. If this condition is encountered, then the electronic control unit also dete…

28, Porsche 912E 28 The following table provides a quick reference for the Porsche 912E tune-up and adjustment parameters. TUNE - UP PARAMETERS Idle Speed 875 – 975 rpm Ignition Timing 27 0 BTDC @ 3,500 rpm Spark Plug Gap 0.7mm/0.028 in. Breaker Point Gap 0.4mm/0.016 in. Dwell Angle …

24, 24 6 Temperature Sensor in Air Flow Sensor Can measure between pins 6 and 27 of the ECU connector to verify sensor is functioning 7 Air Flow Sensor Input Can measure between pins 7 and 8 to verify movement of air flap. 8 Air Flow Sensor Input 9 Air Flow Sensor Input Limiti…