Chrysler New Yorker. Manual — part 685

TEST NS-3A

CHECKING THE ENGINE MECHANICAL SYSTEMS

Perform TEST NS-2A Before Proceeding

FIG. 1

N

O

S

T

A
R

T

T

E
S

T

S

576

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.

N

O

S

T

A
R

T

T

E
S

T

S

577

TEST NS-4A

REPAIRING LOW FUEL PRESSURE

FIG. 1

FIG. 2

FIG. 3

N

O

S

T

A
R

T

T

E
S

T

S

578

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.*

N

O

S

T

A
R

T

T

E
S

T

S

579