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 MANUALSPONTIAC1991FIREBIRD V8-350 5.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSSPECIFICATIONS
1991 Pontiac Firebird V8-350 5.7L
Computers and Control Systems: Specifications
1991 Pontiac Firebird V8-350 5.7LSECTION Specifications
TORQUE VALUES:
Air Cleaner Cover Bolts 1.15 Nm (8.0 lb.in)
Air Plenum Bolts 25 Nm (19 lb.ft)
Clean Air Cover Attaching Bolts 3.4 Nm (30.0 lb.in)
Crossover Tube Retainer Bolts 5.0 Nm (44 lb.in)
Fuel Line Nuts 27.0 Nm (20 lb.ft)
Fuel Pressure Connection 13.0 Nm (115.0 lb.in)
Fuel Rail Attaching Bolts 20.0 Nm (15.0 lb.ft)
Fuel Tank Strap, Front 35 Nm (26 lb.ft)
Fuel Tank Strap, rear 11 Nm (8 lb.ft)
Fuel Tube Bracket Bolt 34.0 Nm (25.0 lb.ft)
Idle Air Control Valve 18.0 Nm (13 lb.ft)
IACV/Coolant Cover Assembly Bolts 3.0 Nm (27 lb.ft)
Inter Air Duct Clamps 3.4 Nm (30.0 lb.in)
Manifold To Runner Bolts 34.0 Nm (25.0 lb.ft)
Outlet Tube To R/H Rail Retainer 5.0 Nm (44.0 lb.in)
Power Brake Vacuum Fitting 27.0 Nm (20.0 lb.ft)
Power Brake Vacuum Line Nut 12.2 Nm (108 lb.in)
Runner To Manifold Bolts 34.0 Nm (25 lb.ft)
Throttle Body Attaching Bolts 24.0 Nm (18.0 lb.ft)
Throttle Position Sensor Screws 2.0 Nm (18 lb.in)
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.