Subject: Load Surging Models: 911 Turbo ALL
Bulletin Number: 77-03
Engine surging at part throttle under load (similar to ignition misfiring) can be caused by a leaking intake manifold gasket
- Replace gasket or gaskets as required (see illustration)
Gasket Part Number 930.110.197.01
There are 12 identical gaskets- 6 between intake manifold and intermediate flanges; 6 between intermediate flanges and heads. Any of these, if a leaking, could cause erratic engine performance.
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