Chrysler New Yorker. Manual - part 685

TEST NS-3A

CHECKING THE ENGINE MECHANICAL SYSTEMS

Perform TEST NS-2A Before Proceeding

FIG. 1

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TEST NS-3A

CHECKING THE ENGINE MECHANICAL SYSTEMS

Perform TEST NS-2A Before Proceeding

*Perform Verification TEST VER-1A.

**Check connectors - Clean / repair as necessary.

REMOVE ALL SPARK

START TEST PLUGS & INSPECT

ARE THE SPARK PLUG 

YES

CLEAN THE SPARK

NS-3A. 

THE TIPS FOR WET

TIPS WET? 

PLUGS.*

FUEL.
FIG. 1

NO 

USING THE SERVICE
MANUAL PROCEDURES,

IS THE ENGINE 

NO 

REPAIR THE ENGINE 

CHECK ENGINE COMPRESSION WITHIN 

AS 

NECESSARY.*

COMPRESSION. SPECIFICATIONS?

YES

USING THE SERVICE
MANUAL PROCEDURES,

IS VALVE TIMING 

NO 

REPAIR THE VALVE

CHECK THE ENGINE WITHIN 

TIMING 

AS 

VALVE TIMING.

SPECIFICATIONS?

NECESSARY.*

YES

REINSTALL ALL

ATTEMPT TO START

DOES THE ENGINE 

YES

DISCONNECTED THE VEHICLE. 

START AND STAY 

TEST 

COMPLETE.* 

COMPONENTS.

RUNNING? 

NO 

PERFORM TEST 

NS-8A. 

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TEST NS-4A

REPAIRING LOW FUEL PRESSURE

FIG. 1

FIG. 2

FIG. 3

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TEST NS-4A

REPAIRING LOW FUEL PRESSURE

*Perform Verification TEST VER-1A.

**Check connectors - Clean / repair as necessary.

WARNING: THE FUEL 

START TEST 

SYSTEM MUST BE 

NS-4A. 

OPENED AND MAY BE 

UNDER HIGH 
PRESSURE.

USING THE

REMOVE THE FUEL 

APPROPRIATE

PRESSURE GAUGE

SERVICE MANUAL AND/OR 

ADAPTOR

RELIEVE FUEL 

FROM FUEL RAIL.

PRESSURE AND... 

INSTALL RECOMMENDED

CONNECT THE

ADAPTER 6539 BETWEEN

RECOMMENDED FUEL 

FUEL TANK OUTLET AND

PRESSURE GAUGE

CHASSIS FUEL SUPPLY 

C-4799-B TO ADAPTER

TUBE. FIG. 1 AND 2

6539. FIG. 3

IGNITION KEY ON.

RECORD THE FUEL 

WITH THE DRB, 

PRESSURE GAUGE

ACTUATE THE ASD

READING. 

FUEL SYSTEM TEST.

REPAIR RESTRICTION

IS THE FUEL 

YES

IN CHASSIS FUEL 

STOP ACTUATION. 

PRESSURE AT LEAST

SUPPLY LINE 

46 PSI OR HIGHER?

BETWEEN FUEL TANK 

AND FUEL RAIL.* 

NO 

USING THE

APPROPRIATE

REMOVE THE FUEL 

IS THE INLET

YES

REPLACE THE FUEL 

SERVICE MANUAL 

PUMP MODULE.

STRAINER PLUGGED? 

INLET STRAINER.* 

RELIEVE FUEL 

PRESSURE AND... 

NO 

REPLACE THE FUEL 

PUMP MODULE.* 

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