2003 Ford Ranger My truck died on me in traffic

If your engine cranks but doesn't start, there's something missing: either spark, fuel, or compression.
You said your timing belt is okay right?

Next step, determine if the problem is either fuel related or spark related:
With a spark tester, determine if you have sparks when you crank your engine.
With a fuel pressure tester, check your fuel pressure.
A quick test, although not as accurate, is to spray some starter fluid inside the throttle and crank the engine. If engine starts your problem is fuel related; if it doesn't it's likely spark related.

If you have spark and fuel, then you have something wrong with your compression (in which case, reply back and we'll look into what could be the culprit).

Could very well be.

Do you hear it when you turn your key to ON?
If you don't, check if you have voltage at the pump.
If you do, but the pump doesn't come on, replace it.
If you don't, check your wiring, relay, fuse, connectors, as well as your safety switch.
The best way to know if your fuel delivery is okay is by checking your fuel pressure.

Let me know if you need anything else.