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.
1991 Mazda 929 BaseFACTORY OEM SERVICE PROCEDURE
Throttle Position Sensor (TPS): RX7: Inspection
- Warm engine to normal operating temperature. Turn off engine. Connect Engine Signal Monitor (499200162) between ECU and ECU wire harness using Adapter Harness (49G018903).
- Check voltages at ECU terminals 2F and 2G. See Fig 1 . See RX7 TPS VOLTAGE TABLE . If voltages are not within specification, remove engine signal monitor and adapter harness. Adjust TPS. See ADJUSTMENT.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.