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²Engine RPM will be displayed on DRB II.
(11)If idle RPM is within the range shown in the Idle Specification chart, throttle body minimum airflow is set correctly.
(12) If idle RPM is not within specifications, shut off the engine and clean the throttle body as follows:
(a) Remove the throttle body from engine.
WARNING: CLEAN THROTTLE BODY IN A WELL VENTILATED AREA. WEAR RUBBER OF BUTYL GLOVES, DO NOT LET MOPAR PARTS CLEANER COME IN CONTACT WITH EYES OR SKIN. AVOID INGESTING THE CLEANER. WASH THOROUGHLY AFTER USING CLEANER.
FUEL SYSTEMS 14 - 155
(b)While holding the throttle open, spray the entire throttle body bore and the manifold side of the throttle plate with Mopar Parts Cleaner. Only use Mopar Parts Cleaner to clean the throttle body.
(c)Using a soft scuff pad, clean the top and bottom of throttle body bore and the edges and manifold side of the throttle blade. The edges of the throttle blade and portions of the throttle bore that are closest to the throttle blade when is closed, must be free of deposits.
(d)Use compressed air to dry the throttle body.
(e)Inspect throttle body for foreign material.
(f)Install throttle body on manifold.
(g)Repeat steps 1 through 14. If the minimum air flow is still not within specifications, the problem is not caused by the throttle body.
(13)Shut off engine.
(14)Remove Air Metering Fitting #6457 from the intake manifold PCV nipple. Reinstall the PCV valve hose.
(15)Uncap the throttle body idle purge nipple and connect the idle purge line.
(16)Remove DRB II.
60-WAY ENGINE CONTROLLER WIRING CONNECTOR
Refer to the engine controller wiring connector diagram (Fig. 20) for wire colors and cavity numbers.
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Fig. 20 60-Way Engine Controller Wiring Connector
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FUEL SYSTEMS 14 - 157 |
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14 - 158 FUEL SYSTEMS |
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FAULT CODE DESCRIPTION (CON'T)
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FUEL SYSTEMS 14 - 159 |
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3.3L AND 3.8L MULTI-POINT FUEL INJECTIONÐSERVICE PROCEDURES |
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INDEX |
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page |
Automatic Idle Speed (AIS) Motor . . . . . . . . . . . |
. 160 |
Camshaft Sensor Service . . . . . . . . . . . . . . . . . . |
166 |
Canister Purge Solenoid Service . . . . . . . . . . . . . |
165 |
Crankshaft Timing Sensor . . . . . . . . . . . . . . . . . . |
165 |
Engine Controller Service . . . . . . . . . . . . . . . . . . |
165 |
Fuel Injector . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
164 |
Fuel Injector Rail Assembly . . . . . . . . . . . . . . . . |
161 |
(1)Disconnect negative battery cable.
(2)Remove the air cleaner to throttle body hose clamp. Remove the nut holding the air cleaner assembly to the air cleaner bracket. Remove the air cleaner (Fig. 1).
(3)Remove throttle and the speed control cables.
(4)Disconnect electrical connectors from the automatic idle speed (AIS) motor and throttle position sensor (TPS).
(5)Disconnect vacuum hoses from throttle body.
(6)Remove throttle body to intake manifold attaching nuts.
(7)Remove throttle body and gasket.
(8)Reverse the above procedure for installation.
Fig. 1 Throttle Body Assembly
When servicing throttle body components, always reassemble components with new O-rings and seals where applicable (Fig. 2). Never use lubricants on
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Fuel Pressure Regulator . . . . . . . . . . . . . . |
. . . . . 163 |
Fuel System Pressure Release Procedure |
. . . . . 159 |
Heated Oxygen Sensor (O2 Sensor) Service |
. . . . 167 |
Manifold Absolute Pressure (MAP) Sensor |
. . . . . 165 |
Throttle Body . . . . . . . . . . . . . . . . . . . . . . . |
. . . . 159 |
Throttle Body Removal . . . . . . . . . . . . . . . . |
. . . . 159 |
Throttle Position Sensor . . . . . . . . . . . . . . . |
. . . . 159 |
O-rings or seals, damage may result. If assembly of component is difficult, use water to aid assembly. Use care when removing hoses to prevent damage to hose or hose nipple.
FUEL SYSTEM PRESSURE RELEASE PROCEDURE
WARNING: THE 3.3L AND 3.8L MPI FUEL SYSTEMS ARE UNDER A CONSTANT PRESSURE OF APPROXIMATELY 330 KPA (48 PSI). RELEASE FUEL SYSTEM PRESSURE BEFORE SERVICING THE FUEL PUMP, FUEL LINES, FUEL FILTER, THROTTLE BODY OR FUEL INJECTORS.
(1)Loosen fuel filler cap to release fuel tank pres-
sure.
(2)Disconnect injector wiring harness from engine harness (Fig. 3).
(3)Connect a jumper wire between terminal Number 1 of one injector harness and engine ground.
(4)Connect a jumper wire to the positive terminal Number 2 of the injector harness and touch the battery positive post for no longer than 5 seconds. This releases system pressure.
(5)Remove jumper wires.
(6)Continue fuel system service.
(1)Disconnect negative cable from battery.
(2)Remove electrical connector from throttle position sensor.
(3)Remove throttle position sensor mounting screws (Fig. 4).
(4)Lift throttle position sensor off throttle shaft.
(1)Install throttle position sensor on throttle shaft. Install mounting screws. Tighten screw to 2 NIm (17 in. lbs.) torque.
(2)Connect electrical connector to throttle position sensor.
(3)Connect negative cable to battery.
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Fig. 2 Throttle Body
Fig. 3 Injector Harness Connector
Fig. 4 Servicing Throttle Position Sensor
(1) Disconnect negative cable from battery.
(2)Remove electrical connector from automatic idle speed (AIS) motor.
(3)Remove AIS motor mounting screws (Fig. 5).
Fig. 5 Servicing Automatic Idle Speed Motor
(4) Remove AIS motor from throttle body. Ensure the O-ring is removed with the AIS motor.
(1)The new AIS motor has a new O-ring installed on it. If pintle measures more than 1 inch (25 mm) it must be retracted. Use the DRB II AIS Motor Open/Close Test to retract the pintle (battery must be connected.)
(2)Carefully place AIS motor into throttle body.
(3)Install mounting screws. Tighten screws to 2 NIm (17 in. lbs.) torque.
(4)Connect electrical connector to AIS motor.