Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2006SEQUOIA 4WD V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISSERVICE PRECAUTIONSVEHICLE DAMAGE WARNINGSFOR VEHICLES EQUIPPED WITH A CATALYTIC CONVERTER
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)
For Vehicles Equipped With A Catalytic Converter
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)SECTION For Vehicles Equipped With A Catalytic Converter
FOR VEHICLES EQUIPPED WITH A CATALYTIC CONVERTER
CAUTION: If a large amount of unburned gasoline flows into the converter, it may overheat and create a fire hazard. To prevent this, observe the following precautions and explain them to your customer.
a. Use only unleaded gasoline.
b. Avoid prolonged idling.
Avoid running the engine at idle speed for more than 20 minutes.
c. Avoid spark jump test.
1. Perform spark jump test only when absolutely necessary. Perform this test as rapidly as possible.
2. While testing, never race the engine.
d. Avoid prolonged engine compression measurement. Engine compression tests must be done as rapidly as possible.
e. Do not run engine when fuel tank is nearly empty. This may cause the engine to misfire and create an extra load on the converter.
f. Avoid coasting with ignition turned off.
g. Do not dispose of used catalyst along with parts contaminated with gasoline or oil.
CAUTION: If a large amount of unburned gasoline flows into the converter, it may overheat and create a fire hazard. To prevent this, observe the following precautions and explain them to your customer.
a. Use only unleaded gasoline.
b. Avoid prolonged idling.
Avoid running the engine at idle speed for more than 20 minutes.
c. Avoid spark jump test.
1. Perform spark jump test only when absolutely necessary. Perform this test as rapidly as possible.
2. While testing, never race the engine.
d. Avoid prolonged engine compression measurement. Engine compression tests must be done as rapidly as possible.
e. Do not run engine when fuel tank is nearly empty. This may cause the engine to misfire and create an extra load on the converter.
f. Avoid coasting with ignition turned off.
g. Do not dispose of used catalyst along with parts contaminated with gasoline or oil.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.