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 MANUALSINFINITI2002G20 L4-2.0L (SR20DE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMIGNITION TIMINGADJUSTMENTS
2002 Infiniti G20 L4-2.0L (SR20DE)
Ignition Timing: Adjustments
2002 Infiniti G20 L4-2.0L (SR20DE)SECTION Adjustments
PREPARATION
- Make sure that the following parts are in good order.
a. Battery
b. Ignition system
c. Engine oil and coolant levels
d. Fuses
e. ECM harness connector
f. Vacuum hoses
g. Air intake system (Oil filler cap, oil level gauge, etc.)
h. Fuel pressure
i. Engine compression
j. EGR valve operation
k. Throttle valve
l. EVAP system
- On models equipped with air conditioner, checks should be carried out while the air conditioner is "OFF".
- On models equipped with automatic transaxle, when checking idle speed, ignition timing and mixture ratio, checks should be carried out while shift lever is in "P" or "N" position.
- When measuring "CO" percentage, insert probe more than 40 cm (15.7 in) into tail pipe.
- Turn off headlamps, heater blower, rear window defogger.
- Keep front wheels pointed straight ahead.
- Make the check after the cooling fan has stopped.
INSPECTION PROCEDURE
- Make sure that the following parts are in good order.
a. Battery
b. Ignition system
c. Engine oil and coolant levels
d. Fuses
e. ECM harness connector
f. Vacuum hoses
g. Air intake system (Oil filler cap, oil level gauge, etc.)
h. Fuel pressure
i. Engine compression
j. EGR valve operation
k. Throttle valve
l. EVAP system
- On models equipped with air conditioner, checks should be carried out while the air conditioner is "OFF".
- On models equipped with automatic transaxle, when checking idle speed, ignition timing and mixture ratio, checks should be carried out while shift lever is in "P" or "N" position.
- When measuring "CO" percentage, insert probe more than 40 cm (15.7 in) into tail pipe.
- Turn off headlamps, heater blower, rear window defogger.
- Keep front wheels pointed straight ahead.
- Make the check after the cooling fan has stopped.
Overall Inspection Sequence:
Step 1 - 2:
Step 3:
Step 4:
Step 5 - 6:
Step 7 - 8:
Step 9 - 10:
Step 11 - 14:
Step 15:
Step 16:
Step 17 - 18:
INSPECTION PROCEDURE
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.