DME 7.8 DME 7.8 0 · Other possible fault causes

DME 7.8 DME 7.8 0 Other possible fault causes ♦worn camshafts ♦leaking valves ♦faulty piston rings If opposing cylinders have misfiring, the cause could be the sensor wheel. If valve lift faults are suspected, perform the system test for large lift and the system test for small lift with the Porsche System Tester 2. Note! If the battery was disconnected, at least range 1 must be adapted before troubleshooting is carried out. Affected terminals - Diagnosis/Troubleshooting Note! If there is a lot of oil in the engine, check that the oil filler tube and cap are tight. Work instruction Display OK If not OK 1 Check for air leaks in intake air system Step 2. Repair intake air system → End. 2 Carry out pressure loss test Step 3. Repair engine → End 3 Check spark plugs. Step 4. Replace faulty spark Specified spark plugs: plug(s). Electrode gap: 1.6 mm ± 0.2 mm. → End Check appearance of spark plugs 4 Check spark plug connectors Approx. 2 kΩ Replace faulty spark Step 5 plug connectors. → End 5 Check ignition coil(s) ♦Measure resistance between Pin 0,3 to 0,7 Ω Replace ignition 1 and Pin 15 (at 20 °C) coil(s) Step 6. → End 2470 P0306 0-49 page 3 Printed in Germany – 4, 2002 p0306