A worn out or damaged component in one or more of several systems like the ignition, starting and fuel may cause a no-start condition on your Ford Mustang. However, most of the time, this is an indication of lack of maintenance rather than a major engine failure.
Start with the obvious and often overlooked part of troubleshooting your Mustang, and make sure the fuel tank has enough gas. Check that your fuel gauge working properly.
Check the battery charge with a multimeter, and make sure it has at least 12 volts. Take the battery to an auto parts or shop for inspection if necessary. Also, measure the voltage drop between each battery post and its cable where it joins the terminal. A voltage drop greater than 0.1 volts means you need to clean or replace the terminals.
Inspect all the connections at the starter solenoid and starter motor. Make sure they are tight and clean. Check the starter and solenoid for proper operation, following the instructions on the vehicle service manual for your particular Mustang model.
Examine the fuel system for proper fuel delivery. The service manual will provide the most common tests to check injectors or the carburetor, fuel pump, relay, fuse, lines and hoses. Make sure your fuel filter is not clogged. If it has over 1 year of service, replace it. Also, keep in mind that if you live in a state with very low winter temperatures, frozen water in the lines may restrict fuel flow.
Test the ignition system for components wear and damage. Your service manual describes how to check spark plugs, wires, distributor and ignition coil.
Check for diagnostic trouble codes using a scan tool. If you have an early 1980s or later Mustang model, the computer system on your vehicle might have data stored in memory showing specific circuits or components with possible problems.
Perform a vacuum and compression diagnostic check if your Mustang is 10 or more years old. These tests can reveal mechanical problems that may interfere with engine performance. Follow the instructions on your vehicle service manual.
