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 MANUALSPONTIAC1991LEMANS LE, 2D HATCHBACK, AUTOMATIC, 3T40/MD9REPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTINGFUEL SYSTEMFUEL PRESSUREFUEL PRESSURE RELEASE
1991 Pontiac LeMans LE, 2D Hatchback, Automatic, 3T40/MD9
Fuel Pressure Release
1991 Pontiac LeMans LE, 2D Hatchback, Automatic, 3T40/MD9SECTION Fuel Pressure Release
To remove any residual system pressure, remove fuel pump fuse No. 16 (20 amps) from fuse block in passenger compartment. Start engine, and run until it stalls. Engage starter again for about 3 seconds. Turn ignition off and install fuse.
RENDER: 1.0x
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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.