Car is fireing an getting gas but want crank

Crank sensor

Have you run a fault code test at the diagnostic connector, see instructions at link with code lists FAQ How to read older GM codes for free

If you have spark and good fuel pressure. The only way it wouldn't start is that the timing is off.

See if your getting spark,If not its probably the crank or cam sensor.

Cranking HARD ?
No Cranking ?
Smell Gas ?
Cranks Fast ?
POSSIBLE - * Battery dead or weak (alternator may not be charging right or gone bad) . * No fire coil pack(s) / rotor button distributor cap Faulty . * Cranks fast ( getting fire but no gas )
FIXES - * JUMP START IF POSSIBLE and if car starts take off 1 battery cable if car dies the ALTERNATOR IS BAD . * Pull 1 plug wire off and check for a hot spark or any spark for that matter .
Could be multiple things with multiple fixs need more info for a more precise answer. Start with the basics POWER +/- , FUEL , AIR , FIRE
Hope this Helps , Flaming Ratchets Auto Repair

you need three things to start a car gas /fire /and timing check the timing first then see if you are getting fire to spark plugs then pull your fuel line at motor crank motor see if gas Is present no gas replace fuel pump no fire replace coil if timing has jump replace timing belt

Are you certain it's getting gas, does it smell flooded?
Pull one of the plugs, see if its wet after cranking.
Ground plug and check for spark, if no spark, problem could be crank sensor or coil packs.

need more info is it getting fire getting gas remove he air filter and drop some gas down the carb if it starts then it is in the fuelsystem if not check your plugs that they aer fireing rember gas fire timeing and compreshion

Now that a mechanic, I assume tested your car & told
you what was needed,why are you here?

sounds like the timing is off. check the firing order to be sure your plug wires are on the correct positions on the coil packs. if that checks out, possibly a timing chain may need replaced. i hope this helps
don k.