Question about 2002 Ford Mustang
There are a few items you should check.
This is an electrical issue - and has to do with heat.
If there is a clod or cracked solder joint on the board of any module - the heat makes the components expand - and no longer make connection.
The most likely suspects are the PCM (Powertrain Control Module) and the CCRM (Constant Control Relay Module)... but there are things to check before replacing them.
#1. Check your fuses (F23.4 20A) ( F2.2 20A) (F1.26 30A) (F1.14 30A) all fed the PCM - just because they "look" good does not mean they ARE good. If the fuse is blow or separated at the side leg of the fuse you'll never see that it is bad. Once it heats up - the same thing happens - the filament separates and no connection for current flow.
#2 check relays like the inertia fuel shutoff, PCM power relay, and Fuel Pump relay.The PCM power relay and Fuel Pump relay are a contained module - called a Constant Control Relay Module.
If all fuses and relays check out, and you have tried to read OBD codes (and dont find them) the PCM should be replaced. It does not report errors on itself. Heat also affects older PCMs the way I described above... vibrations or age cause bad solder joints. From thermal expansion - the components inside heat up and enlarge... breaking the power connection and power to your vehicle.
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Posted on Jul 04, 2009
What you describe is a bad alternator/battery concern. Hook your battery to a 10amp charger for at least 3 hours and try to start. If it starts then you know that the alternator is bad. If it fails to start then you have a junk battery. My vote would be for a bad alternator.
Posted on Jul 03, 2009
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Posted on Jan 02, 2017
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