Jeep 2006 Wrangler User Manual

Page 277

To minimize the possibility of catalytic converter dam-
age:

• Do not shut off the engine or interrupt the ignition

when the transmission is in gear and the vehicle is in
motion.

• Do not try to start the engine by pushing or towing the

vehicle.

• Do not idle the engine with any spark plug wires

disconnected or removed, such as when diagnostic
testing.

• Do not idle the engine for prolonged periods during

very rough idle or malfunctioning operating conditions.

• Do not allow vehicle to run out of fuel.

NOTE:

Intentional tampering with emissions control

systems can result in civil penalties being assessed
against you.

Engine Timing Belt — 2.4L Engine

Replace the engine timing belt at the intervals described
in the appropriate maintenance schedule.

Ignition Wiring System — 2.4L Engine

Replace the ignition cables at the intervals described in
the appropriate maintenance schedule.

Crankcase Emission Control System
Proper operation of this system depends on freedom
from sticking or plugging due to deposits. As vehicle
mileage builds up, the PCV valve and passages may
accumulate deposits. If a valve is not working properly,
replace it with a new valve. DO NOT ATTEMPT TO
CLEAN THE OLD PCV VALVE!

Check ventilation hose for indication of damage or
plugging deposits. Replace if necessary.

MAINTAINING YOUR VEHICLE

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