Fuel, spark, air, compression and cranking are 4 basic requirements for a car engine to start. How would you narrow down which of these requirements may be the problem? What would you look for?

Answer 1

First thing is to keep it simple. In most cases this is the issue. Eliminate the obvious and easily accessible. Try inspecting spark plugs. Check for carbon tracking or wear or clues on plug how the engine is burning that particular plug. Swap if necessary. Inspect ignition system, swap ignition coil if necessary. Trace the problem if it move to other location. Inspect fuel and pressure. Inspect starting system and charging system. Diagnose mechanical possibility. Inspect electrical failure possibility to any engine computer controlled device like fuel injector or ignition coil. Repair malfunction then confirm repair.

While this is a general outline. The main idea will always be to first understand the concern of the owner. Second is to try and duplicate said concern. Third is to analyze the concern and attempt repair. Use all available information to the job. Followed by confirming the repair and returning car to customer.