93 Ranger 4.0L won't start

First, DO NOT start the engine if the mechanical timing is wrong! My next obvious suggestion is to get it to a good mechanic and get them to sort it out for you.
I'm assuming your refering to the Mechanical Timing? Mazda use an 'Interference' engine so read this all the way through BEFORE doing any work. An interference engine means the valves will hit the piston face if the mechanical timing is even slightly out. That is why you don't start your engine with the timing set wrong. It's a VERY expensive repair.
Start from scratch. Remove the chain from the CAMs and cable tie it to something on the top of the engine to stop it disappearing out of sight.
Turn the Crank to about 10 to 15 degrees past Top Dead Centre (TDC). This is to move the pistons away from the valves so you can set the Cam timing marks. Set the Cam marks first then turn the Crank BACK to TDC. As long as the chain marker on the crank sprocket is lined up correctly the Cam chain markers should be correct.
Once you have timed everything into place use a socket and ratchet to turn the Crank pulley bolt Clockwise 2 full rotations. The timing marks should return to the correct positions.

replace the engine

Turn the motor so the timing marks are together and take the chain off. Should change the chain if it's sloppy lose.

What do you mean it won't crank ? Is it a no crank - no start or does the starter spin the engine an it won't start an run ?

Sounds like head gasket again, but may be more serious this time. Overheating is not something to take lightly.

Pull plugs. crank. Water come out of cylinders? Head gasket. Possible cracked block or head this time, too. I'd be looking at a replacement engine.

air trapped in engine let it run with cap off it will burp a few times then it should be good

I am assuming you have the 2.2L 4 cylinder engine. The timing chain tensioner on these engines is nororious for failure resulting in jumped timing. Be advised that depending upon the situation, you may have sustained major engine damage. If the timing simply jumped when turning the engine off, you may be safe, but if it occurred at highway speed, there is a high probability that there is valve damage in the engine that will need repair before you can move on to the timing chain and tensioner. As far as "other components", if your know that the head is ok, then you should replace the timing gears, chain, and tensioner. Also purchase a "timing gasket set" which will give you the gaskets ans seals you need to do the job.

I'm assuming that your engine is fuel injected. I had this same problem with a 93 s-10. The problem was a drop in oil pressure after the engine reached operating temp. The computer, sensing a drop in oil pressure would not let the injectors fire when I tried to restaart the engine. I used a jumper wire to bypass the oil presssure sending unit and never had the problem again. If the jumper wire works, then you either have a bad oil pressure sending unit, or you have a problem with low oil pressure. Hope this works for you.

Sounds like a 2.4 Quad four engine? If so the chain has either different colored links marked links that have to be aligned with the marks on the cam gear[s] and the crank gear.A chiltons book will show you how.

sorry to tell ya but you blew head gasket or cracked head or engine block teardown to inspect