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 MANUALSPONTIAC1987FIREBIRD FORMULA, 5.0 H, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCEADJUSTMENTTUNE-UP - 2.8L/173" GAS MPI V6 VIN [S]COMPUTERIZED ENGINE CONTROL SYSTEMTHROTTLE POSITION SENSOR (TPS) CHECK/ADJUSTDESCRIPTION
1987 Pontiac Firebird Formula, 5.0 H, Automatic
Throttle Position Sensor (TPS) Check/Adjust: Description
1987 Pontiac Firebird Formula, 5.0 H, AutomaticSECTION Description
This ECM auto-zeros the TPS voltage at idle. This means the ECM reads the TPS voltage at idle as indicating 0% throttle opening (as long as the voltage is within the specified range).
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.