- No start/hard start (but starter works) -
loose broken wiring/cables/connections, faulty neutral safety or ignition switch, spark plugs are dirty/worn or incorrect gap, computer-related, incorrect timing or broken timing belt.

- No start (starter doesn’t work) -
dirty/corrosive battery terminals, shift selector not in park, faulty starter/solenoid, battery dirty/discharged/worn out, loose broken wiring/cables connections, faulty alternator, voltage regulator, slipping belt.

- “Check Engine” light on -
loose or broken wiring/cables/connections.

- Engine overheats -
low coolant/incorrect mixture, slipping belt, inoperative electric cooling fan, faulty radiator cap, worn/broken water pump, clogged radiator pump/hose/coolant passages, leaking internally or externally, sending unit sensor incorrect timing, faulty gauge warning light, thermostat.

- Engine runs rough at idle -
loose or broken wiring/cables/connections, spark plugs are dirty/worn or incorrect gap, faulty distributor/rotor/coil/ignition wires, computer-related problem, incorrect timing.

- Engine runs rough at highway speeds -
loose or broken wiring/cables/connections, spark plugs are dirty/worn or incorrect gap, faulty distributor/rotor/coil/ignition wires, computer-related problem, incorrect timing.

- Engine stalls or hesitates -
Spark plugs are dirty/worn or incorrect gap, faulty distributor/rotor, coil/ignition wires, computer-related problem, incorrect timing.

- Engine surges -
Spark plugs are dirty/worn or incorrect gap, incorrect timing.

- Engine lacks power -
Loose or broken wiring/cables, connections, spark plugs are dirty/worn or incorrect gap, faulty distributor/rotor, coil/ignition wires, incorrect timing.

- Battery frequently discharges -
dirty/corrosive battery terminals, battery is dirty/discharged or worn out, loose or broken wiring/cables/connections, faulty alternator/voltage regular, slipping belt.

- Alternator light on -
loose or broken wiring/cables/connections, faulty alternator/voltage regular, slipping belt.

- Excessive oil consumption -
worn/damaged valve train components, internal engine problems.

- Clicking, tapping noise (increases with engine speed) -
carbon build-up, worn/damaged valve train components, internal engine problems.

- Pinging (on acceleration) -
carbon buildup, internal engine problems.

- Knocking -
incorrectly adjusted/worn/broken timing belt, worn engine mounts, internal engine problems.