Visually inspect following component condition or operation:

Electrical wiring, looking for chafed, stretched, cut or pinched wires. Ensure electrical connectors fit tightly and are not corroded.
Ensure vacuum hoses are properly routed and are not pinched or cut. See appropriate diagram in VACUUM DIAGRAMS article to verify routing and connections (if necessary).
Inspect air induction system for vacuum leaks.
Engine oil condition, level and leakage.
Engine coolant condition, level and leakage.
Fuel level and leakage.
Automatic transmission condition, level and leakage.
Air filter element clogging.
Battery volage level, corrosion and terminal tightness.
Drive belt tension and condition.
Throttle cable play and chaffing.
Fuses blown.
Auxiliary engine components for looseness and installation.
MIL operation.
Engine oil pressure warning light operation.
Engine temperature gauge operation.
Fuel level gauge operation.
Tachometer operation, if equipped.
Exhaust system for leaks.

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.

Safety Warning

Visual Inspection