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.
1993 Infiniti G20 AutomaticFACTORY OEM SERVICE PROCEDURE
Firing Order & Timing Marks: Notes
NOTE:
For firing order, see Figure-Figure
. Q45 uses a distributorless ignition system. Firing order for Q45 is controlled by ECU through left and right power transistors. On G20 adjustments to timing are made by rotating distributor after loosening mounting bolts. On J30 and Q45 adjustments to timing are made by rotating crankshaft position sensor after loosening mounting bolts.
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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