Every few weeks, I will try to start my car, you can hear it crank, but just won't start. The mechanics check all the codes and everything looks fine. New spark plugs, new wires, new fuel pump. Could it be the crank sensor or the ignition switch?? It happens when it gets warm outside, over 80 degrees.
Try tapping the crank sensor while someone turns the key on(dont try to start just turn key forward until the radio will come on) it should whirl when the key is turned, if not tap it then you should hear it whirl. then try to start.
It sounds likwe the crank sensor
SOURCE: Ford Explorer 97 - cranks but won't start sometimes
I don't see anywhere where you replaced the drive belt or the fuel filter it could be building up pressure in the fuel pump causing the sending unit to stick but before you do all this get a digital volt meter and check out the crank sensor I'm just asking because it has happened to me if you have a lot of keys on one key ring it can damage the ignition switch so check out the crank sensor and the ignition switch first
SOURCE: 1997 Ford Explorer, about once
Check the exhaust compression. Remove the O2 sensors before the cataylic converts and see if it improves. If it does that means your cats are cloged and need to be replaced.
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