* Fuel system issues:
* Check fuel pressure and filters
* Test fuel injectors
* Clean throttle body
* Ignition system issues:
* Check spark plugs and wires
* Test ignition coil
* Check distributor cap and rotor (if applicable)
* Air intake system issues:
* Check air filter
* Inspect air intake hose and connections for leaks
* Clean mass air flow sensor (MAF sensor)
* Electrical system issues:
* Check battery voltage
* Test starter motor and solenoid
* Inspect wiring and connections for shorts and loose connections
* Engine mechanical issues:
* Check engine compression and oil pressure
* Test valve train components
* Inspect for any blockages in the fuel system (such as a dirty fuel filter or failed fuel pump)