Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 907
DME 7.8 DME 7.80 · Perform system test for large lift
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DME 7.8 DME 7.80
Perform system test for large lift
Warning!
Test is carried out while driving. Have a second person oper-
ate the Porsche System Tester 2.
1 - Select system test.
2 - Select "Request large lift".
If "Valve lift diagnosis not ready" appears, a fault may have
been stored. In this case, delete the fault memory.
The engine must be at operating temperature.
1. Carry out acceleration with wide-open throttle in 2nd gear
up to 7,000 rpm. Test in manual range for Tiptronic vehi-
cles
After 3,000 ignitions the Tester indicates whether a fault is
present or not.
In order to ensure that the fault is repaired, the flat-base tappets of
the inlet valves of the entire cylinder bank should be replaced if a
fault occurs.
0-156.1 page 2 1555 P1350 - 911 Carrera
p1350a Printed in Germany – 8, 2002
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