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.
1998 Mazda 626 DX, AutomaticFACTORY OEM SERVICE PROCEDURE
Misfire Monitor Repair Verification Drive Cycle
- On models with Fuel Level Input (FLI) circuit to PCM terminal No. 12, check fuel gauge and FLI PID value. Misfire monitor can only be tested if fuel gauge reads more than 1/4 full or FLI PID value is more than 15 percent.
- On all models, start engine. Drive vehicle to a location where vehicle speeds can reach 55-60 MPH and then coast down to 40 MPH without traffic interference. Accelerate at wide open throttle to allow vehicle to shift at red line (if equipped with a tachometer).
- Immediately return to normal speed limits. Accelerate vehicle speed to 60 MPH for 30 seconds. Take foot off accelerator and coast down to 40 MPH. Stop vehicle and repeat QUICK TEST .
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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