Ford Mustang FAQ

2003 Ford Mustang Will Not Start.

Question: 

I have a 2003 Ford Mustang and it will not crank over.  I took it to shop and they can not tell me any thing either when i turn it off at and in the morning it will not start at all when you spray some quick start it will start but it will not stay running can you advise me?

Answer:

Do you have a check engine light on the dash?  Did the shop scan the ECU for trouble codes?

An engine needs 3 things to run, Air, Fuel and Spark. Given that spraying starter fluid in the engine gets the engine to fire, I would say it’s safe to say you are getting air and spark so it’s time to look at fuel.

The first thing to check is the fuel pump and fuel filter.  Most modern cars also have a shock sensor which will kill the fuel pump in the event of an accident.  A mechanic should be able to trace the fuel pump circuit from the fuse panel, through the relay and down to the pump which is most likely located in the fuel tank itself.

If everything is OK with the fuel pump then it’s possible the fuel filter is clogged.  Once that has been checked, then the fuel injectors need to be checked to be sure they are firing.  A bad engine computer (ECU) will keep the injectors from firing.  If the injectors are firing, then the throttle position sensor or MAF should be checked next.