DME 7.8 DME 7.80 · Work instruction Display OK

DME 7.8 DME 7.80 Work instruction Display OK If not OK 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 6 Check all connectors for secure fastening and corrosion Step 7. Clean plug connec- tions and connect securely. → End 7 Check fuel pressure ♦Undo and remove the closure Step 8. cap of the fuel collection pipe test connection (A/F 13 mm) ♦Connect pressure gauge (spe- cial tool P 378a) to connecting line (special tool 9559) and con- nect to test connection. ♦Actuate fuel pump, either with the Porsche System Tester or via a fuel pump relay without tester ♦Nominal test value, stationary 3,8 ± 0.2 bar engine ♦Nominal test value, engine idling 3,3 ± 0.2 bar Step 9 Note! The seal or sealing ring in the brass closure cap is not exchangea- ble. It must therefore be used only once. Tightening torque of new brass closure cap 2.5 ± 0.5 Nm (2.0 ± 0.5 ftlb.) 0-48 page 4 2470 P0305 p0305 Printed in Germany – 4, 2002