If you have the three things that you need Fuel, air, and spark then timing must be the culprit
are you getting spark?
check for spark
first check to see if your getting spark, or fuel
make sure it's getting fuel and make sure it's getting spark to the plugs.
I would replace the ignetion module that is in the distributor.
make sure its not getting to much fuel and check the timeing/and if the wires are in the right order
is it getting gas ? do you have spark?
Is it getting gas? Spark? Did you pump the gas pedal while you were starting/cranking the motor?
check your mass air flow sensor . tap on it GENTLY . should start
check and make sure you are getting spark to coils!!
check for spark from the number one plug wire if no spark then start with the coil
Take a known good spark plug and connect it to one of the spark plug wires. Ground the plug to the block and watch the gap for spark while someone tries to start the engine.