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.
1990 Pontiac LeMans BaseFACTORY OEM SERVICE PROCEDURE
Torque Specifications
TORQUE SPECIFICATIONS
| Application | Ft. Lbs. (N.m) | |
|---|---|---|
| Fuel Line Nuts | 20 (27) | |
| Oxygen Sensor | 30 (41) | |
| Throttle Body Assembly Mounting Bolts | 12 (16) | |
| INCH Lbs. (N.m) | ||
| Fuel Injector Retaining Screw | 27 (3) | |
| Fuel Metering Assembly-To-Throttle | ||
| Body Screws | 53 (6) | |
| Fuel Pressure Regulator Cover Screws | 22 (2.5) | |
| Throttle Position Sensor Screws | 18 (2) | |
| Vacuum Tube Module Screws | 27 (3) | |
Factory Service Tools
Use the Manual With the Right Hardware
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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.