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.
1991 Chevrolet Forward Control 5.7 K, AutomaticFACTORY OEM SERVICE PROCEDURE
General Inspection
- Ensure proper starting procedure is being used.
- Visually check vacuum hoses for splits, kinks and improper connections. See underhood emission control information label. Check ignition wires for cracking, hardness and improper connections at both distributor cap and spark plugs.
- Remove spark plugs. Check and replace as necessary.
- Remove distributor cap and check for moisture, dust, cracks, burns and arcing to ground through coil mounting screws or rotor.
- Try to turn distributor shaft by hand.Drive gear pin may be broken.
- If vehicle has been exposed to very cold temperatures, ensure oil is proper viscosity and not contaminated with gasoline.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.