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.
1987 Pontiac Fiero Base, Standard, MG3FACTORY OEM SERVICE PROCEDURE
Pressure Test: Electrical
- Most vehicles use a fitting to allow pressure test without separating fuel lines. If not, separate fuel line from injector inlet "T". Install a "T" connector with a pressure gauge in the line and reconnect line to injector.
- Hold pressure gauge about 16" (406 mm) above fuel pump. Pinch off fuel return line (if equipped) using care not to damage hose. Start engine and observe pressure.
- After pressure check, reconnect steel line. If pressure is not within specifications or varies greatly, replace fuel pump.
Factory Service Tools
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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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