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]NOTES & PRECAUTIONS
1987 Pontiac Firebird Formula, 5.0 H, Automatic
Notes & Precautions
1987 Pontiac Firebird Formula, 5.0 H, AutomaticSECTION Notes & Precautions
When performing tune-up procedures described in this article, the following notes and precautions should be followed:
- This engine is used exclusively on the Camaro and Firebird models. It was introduced in 1985 and used through 1989.
- A cold-start injector is used on all models. It is used to add extra fuel when the engine is cold. It is non-ECM controlled. Don't overlook this during relevant diagnosis.
- A deceleration valve (gulp valve) is used on M/T equipped models. If dealing with a vacuum leak, be aware of its existance.
- When doing computer system diagnosis, ALWAYS start with the Diagnostic Circuit Check. This procedure is found under the COMPUTERIZED ENGINE CONTROL SYSTEM header.
- The Diagnostic Trouble Codes (DTC) Charts, A-charts, B-charts, and C-charts are not contained in this article. They can be found in the appropriate article in the ENGINE PERFORMANCE section. Therefore, if a procedure in this article direct you to one of these charts, proceed to the ENGINE PERFORMANCE section.
- Specifications and/or procedures shown on the Vehicle Emission Control Information label (in the engine compartment) supersedes all data in this article in the event of a conflict. In other words, if the information in this article and the label differ, use the label information.
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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.