DaimlerChrysler LH New Yorker 1994, Electronic Service Manual

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(4) Clean inside of air cleaner lid and body with
vacuum or compressed air. If oily, wash with solvent.
To Install, reverse the preceding operation.
CRANKCASE VENTILATION SYSTEM
Engine crankcase pressure and emissions are
vented into combustion chambers through the posi-
tive crankcase ventilation (PCV) system (Fig. 8 or 9).
The PCV system should have enough volume to over-
come crankcase pressure created by piston backwash.
If a PCV system becomes plugged, the crankcase
pressure will increase and force engine oil past the
piston rings creating oil consumption. Blockage of
PCV system can occur at the vacuum source coupling,
PCV valve or a collapsed hose.
Chrysler Corporation recommends that a PCV valve
not be cleaned. A new Mopar or equivalent PCV valve
should be installed when servicing is required. Over a
period of time, depending on the environment where
vehicle is used, deposits build up in the PCV vacuum
circuit. PCV system should be inspected at every oil
change. Service PCV system if engine oil is dis-
charged into air cleaner.
PCV SYSTEM TEST
Refer to group 25, Emission Control System for
proper procedures to test PCV system.
FUEL RECOMMENDATIONS
Chrysler Corporation recommends that only fuel
purchased from a reputable retailer be used. Use high
quality, unleaded gasoline to provide satisfactory
driveability and highest fuel economy. Gasoline con-
taining detergent and corrosion control additives are
desireable. If the engine develops spark knock (au-
dible ping), poor performance, hard starting or stall-
ing, purchase fuel from another source. Engine per-
formance can vary when using different brands of
gasoline with the same octane rating. Occasional light
engine spark knock under heavy acceleration, at low
speed or when vehicle is heavily loaded is not harm-
ful. Extended periods of spark knock under moderate
acceleration
or at cruising speed can dam-
Fig. 6 Air Cleaner
Fig. 7 Cleaning Air Filter Element
Fig. 8 PCV System—3.3L Engine
Fig. 9 PCV System—3.5L Engine
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