will not start after replacing timing belt

'IF' ignition spark is ok (?) .. Suspect engine is not timed properly .. Check out the link below: http://www.ranger-forums.com/sohc-2-3l-2-5l-lima-engines-135/2-3-liter-timing-marks-diagram-76148/

We have also seen where some of the stripped off "teeth" from the old timing belt gets caught between the crank sensor and the reluctor wheel on the crank. You might want to look at that as well as making sure all the timing marks line up.