I am having problems with my truck starting. When it first started having this on 2001 Ford F-250 Super Duty

My truck will not fire off. It just turns over and every now and then it will fire up. I have tried either in it and it still will not start. I started having problems with it just every now and then but now it has not stated in about a week of trying. It turns over great but seems like it is not firing. Please help me please.

1 answer
First off is this a diesel of Gas engine? If you used either and it did start, but only ran for a few seconds, you probably have a fuel problem. Have you changed the fuel filter? Could also be a weak fuel pump.