2004 Ford Ranger V6 engine won't start

Make sure the fuel pump cut off (inertia) switch hasn’t tripped to the OFF position - see owners manual > Roadside Emergency. Otherwise seek *hands-on* assistance from qualified personnel. Good luck!

When you say "the cylinders are not firing" - are you saying there is no spark at the spark plugs? If you pull an ignition wire, are you seeing an arc of spark when cranking?