Q: Car will not crank

This may be a faulty starter that is going bad or potentially a failing starter solenoid. The starter solenoid is located on the starter and has internal electrical contacts that transmit electricity to the starter. When this fails, it may cause a clicking sound and will not allow the starter to engage the flywheel when you turn the key. In some cases when this happens, the starter may work intermittently. In some cases when bumping the starter with a hammer, this has been known to cause it to work when it otherwise did not work. This same effect may have been reproduced by banging on the hood. I would suggest having a professional from YourMechanic come to your home to diagnose your starter.