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FUEL SYSTEM: GASOLINE VEHICLES
THROTTLE BODY
See General Warnings on page 1-1.
Before suspecting the throttle body as the cause of poor engine performance, make sure the fuel and ignition systems
are in proper operating condition. Check the following items:
• Spark plug and gap condition. See Spark Plug on page 22-5.
• Air filter element. See Air Filter on page 23-14.
• Air intake system (for restriction of air flow). See Air Intake System on page 23-14.
• Exhaust system (for restrictions). See Exhaust System: Gasoline Vehicles on page 24-1.
• Fuel pump. See Fuel Pump Module on page 23-18.
• Fuel line. See Fuel Line on page 23-16.
• Fuel pickup screen or filter. See Fuel Filter on page 23-23.
THROTTLE BODY REMOVAL
See General Warnings on page 1-1.
1.
Turn the key switch to the OFF position and remove the key, place the Forward/Reverse handle in the NEUTRAL
position, and chock the wheels.
2.
Disconnect battery. See Disconnecting the Battery – Gasoline Vehicles, Section 1, Page 1-4.
3.
If equipped, remove air deflector from top of engine.
4.
If necessary, remove fuel tank to increase access to the throttle body (1). See Fuel Tank Removal, Section
23, Page 23-21.
5.
Clean the throttle body (1) and surrounding area (Figure 23-2, Page 23-4).
6.
Disconnect breather hose (2) from air intake adapter (3).
7.
Disconnect governor cable from bracket (4).
8.
Disconnect fuel injector and MAP sensor.
9.
Remove spring clamps securing fuel line (6) and vent hose (5) to throttle body (1) and disconnect vent hose (5).
10. Disconnect fuel line (6) and drain into an appropriate container. See following WARNING. Temporarily plug
fuel line to prevent fuel leakage.
WARNING
• Fuel may be under pressure. Use extreme caution when disconnecting fuel line to prevent the spray of
fuel onto hot engine. See Relieving Fuel Pressure on page 23-2.
• Carefully drain any fuel into an approved container. Add drained fuel back into fuel tank or dispose
of properly.
11. Loosen air intake hose clamp and disconnect air intake hose.
12. Remove two flange nuts (7) and slide air intake adapter (3), bracket (4), gaskets (8), insulator (9), and throttle
body (1) off threaded studs.
2015 Carryall 550 Maintenance and Service Manual
23
Throttle Body
Page 23-3
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Table of Contents
Troubleshooting
