MY CAR CRANKS BUT WON'T START. WHY?

   Before the introduction of computerized engine controls, diagnosing a no start condition was very easy. In order the car to start it needs four basics things that never changed. It needs fuel, it needs air, it needs spark and exhaust.

   First thing a technician will check if battery is fully charged and if engine cranks.

• 12.66 volts = 100% charged

• 12.45 volts = 75% charged

• 12.24 volts = 50% charged

• 12.06 volts = 25% charged

• 11.89 volts = 0% charged

   If engine cranks but just does not start we need to do a basic checks:

   Checking for spark

While you crank the engine observe if spark is present at the end of ignition wire or ignition coil. 

   Checking for fuel

Connect fuel pressure gage and crank engine to verify that fuel pressure is present and is into manufacture specifications.

   Checking for air

After air filter is removed check the intake manifold for restrictions. 

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How Do I Know if I Need a Starter Replacement?
If you are having trouble starting your car, it is likely that you either have a dead battery or need to replace your starter. If the car will not start but all of your electrical components, such as your car lights and stereo, are still working, then the issue is likely with the car starter. If it takes more than one attempt to get your car going, you should get a replacement starter as soon as possible.
 

Mobile Starter Repair in San Diego 
If you are unable to get your car started, AZ Express Mobile Mechanics can help. We offer mobile car diagnostics, coming to your location to determine what is wrong with your car. Once we have identified why the car won’t start, we will quickly repair it onsite
 

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