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You need 3 things for an engine to run: Fuel, Spark or air.

Since air is the least likely, like the previous poster said, check fuel & spark.

You can have pressure on the rail (from build up from the cranking) but have not enough pressure to run. Change out you fuel filter, its $15 and should be done annually anyways. Test your injectors (you can do this with handtools, youtube has vidoes).

Test your sparkplugs (this can be done with a sparkplug tester or manually).

Also check all your fuses & relays, and make sure that you validate your gas hasn't gone bad (or you pumped bad gas into your tank -- this has happened to me).

Check your oil pressure as well (there's gauge for that), chances are its a bad sending unit (only used to show on dash), but you'll want to be extra sure.
 

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I would not pour any gas into the intake.
I second this.

1997-2001 have an in tank fuel filter that is not changed unless fully clooged and there is low fuel pressure.
Note to self, don't get a 97-2001 model.

I'd still pull the filter and swap it anyways. Its a ***** to do, but if you've been cranking it constantly it can slowly build up enough pressure that the rail will test good, but it won't be enough to completely start the car or keep it running for long, once it burns it out of the rail. That was *exactly* what was happening to mine (it started but only after I manually primed it 5-6 times), and now, my 96 starts up first crank every time. I also ran premium gas in here and dropped 8oz of Marvel's Mystery Oil to clear out any other gunk.
 
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