2003 Taurus no start at Witt's end on this

[Stalker34]

OK I need help I have a 2003 Taurus SES Vulcan and it will not fire up I have fuel I have spark even compression but nothing it just keeps cranking if I let off of the key from trying to turn it over it will sometimes pop or backfire . I'm going crazy with this thing

[kyledooley]

Cam or crank position sensor?

If you're sure all the ingredients are there, it's a matter of timing.

[The Bone]

It may also be a timing belt. You need to do a compression test on all the cylinders to be sure that its not a belt also.

[03sestaurusman]

had same issue on same yr, taurus. if the eng. has good cranking power then start buy listening for fuel pump powering up when you turn key to on position (don't start it) if you don't hear it buzzing underneath then that is where you start , it was the issue on mine.