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)
Part Required:
Gasket Part Number 930.110.197.01
Note:
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.
home page: klassikats.com