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 MANUALSTOYOTA2004TUNDRA 4WD V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMIGNITION TIMINGTESTING AND INSPECTION
2004 Toyota Tundra 4WD V8-4.7L (2UZ-FE)
Ignition Timing: Testing and Inspection
2004 Toyota Tundra 4WD V8-4.7L (2UZ-FE)SECTION Testing and Inspection
INSPECTION
1. WARM UP ENGINE
Allow the engine to warm up to normal operating temperature.
2. CONNECT TOYOTA HAND-HELD TESTER OR OBD II SCAN TOOL
a. Connect the hand-held tester or OBD II scan tool to the DLC3.
b. Please refer to the hand-held tester or OBD II scan tool operator's for further details.
3. CHECK IDLE SPEED
4. CONNECT TIMING LIGHT TO ENGINE
Connect the tester probe of a timing light to the wire of the ignition coil connector for No. 1 cylinder.
5. INSPECT IGNITION TIMING
a. Using SST, connect terminals to TC and CG of the DLC3.
SST 09843-18040
b. Using a timing light, check the ignition timing.
Ignition timing: 8 - 12° BTDC @ idle (Transmission in neutral position)
c. Remove the SST from the DLC3.
SST 09843-18020
6. DISCONNECT TIMING LIGHT FROM ENGINE
7. DISCONNECT TOYOTA HAND-HELD TESTER OR OBD II SCAN TOOL IDLE SPEED
1. WARM UP ENGINE
Allow the engine to warm up to normal operating temperature.
2. CONNECT TOYOTA HAND-HELD TESTER OR OBD II SCAN TOOL
a. Connect the hand-held tester or OBD II scan tool to the DLC3.
b. Please refer to the hand-held tester or OBD II scan tool operator's for further details.
3. CHECK IDLE SPEED
4. CONNECT TIMING LIGHT TO ENGINE
Connect the tester probe of a timing light to the wire of the ignition coil connector for No. 1 cylinder.
5. INSPECT IGNITION TIMING
a. Using SST, connect terminals to TC and CG of the DLC3.
SST 09843-18040
b. Using a timing light, check the ignition timing.
Ignition timing: 8 - 12° BTDC @ idle (Transmission in neutral position)
c. Remove the SST from the DLC3.
SST 09843-18020
6. DISCONNECT TIMING LIGHT FROM ENGINE
7. DISCONNECT TOYOTA HAND-HELD TESTER OR OBD II SCAN TOOL IDLE SPEED
RENDER: 1.0x
NO RELATED
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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.