What causes a car not to start if the battery is good?
Dead Battery – A dead battery is the most common reason your car won’t start.
Your battery can die for a variety of reasons; you left the dome light on over night, a wire is loose, water inside the component evaporated leading to poor conductivity, or it’s simply a really old battery!.
How do you diagnose a car that won’t start?
Car Won’t Start Diagnose GuideIs the engine cranking? … Check the trouble code memory. … Check the crankshaft/camshaft sensors. … Check the fuel pressure. … Check the spark from the ignition coil. … Check if the injectors are opening. … Check the Crankshaft/Camshaft timing. … Check compression/leak down test.
What are the signs of a bad ignition coil?
Symptoms of a Bad or Failing Ignition CoilEngine misfires, rough idle, and loss of power. One of the most common symptoms associated with a faulty ignition coil is engine performance issues. … Check Engine Light comes on. Another symptom of a potential issue with the vehicle’s ignition coils is an illuminated Check Engine Light. … Car is not starting.
Why does my engine turn over but not start?
A less common cause is a worn starter that draws so many amps while cranking the engine that there’s not enough juice left to adequately power the ignition system and fuel injectors. Contributing factors might be a weak battery and/or loose or corroded battery cables. … The problem is either fuel or compression.