Porsche 928 Workshop Manual page 407

Fuel Manaaement - LH - JetroniclCont.
Removing
and installing injection valves (32~valve engine)
1, Remove air intake hoses and air filter sys-
tem as a unit.
2. Slacken holder of exhaust sampler and
hose clamps on intake pipe and lift off in-
take manifold.
3. Remove both untion nuts from fuel-distribu-
tion pipe, using a second open-end wrench
to counter the nuts. Catch the fuel from the
pipe in a suitable container.
4. Remove ignition lead and cable clip from
distribution pipe. Disconnect distribution
pipe from intake pipes and lift off.
5. Disconnect electrical connections, remove
retainers and extract injection valves.
Installation
1. Replace injection valve seals. Apply a thin
coat of oil to the housing bore.
2. Visual check to ensure system leak tight-
a
Removing and installing injection valves (32-valve engine)
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Printed in Germany - XXVII. 1991