Won't start

[Scotts1988chevy]

I own a 1988 Chevy c1500 with a 5.7 engine it was running fine 2 days ago now it won't start I have changed EGR valve, EGR solenoid , TPS , spark plugs, rotor & cap. Still won't start.. any ideas?

Thank you

 

[smdk2500]

Do you have spark? Do you have fuel? Do you have the proper amounts of each?

 

[Jeepwalker]

I agree with the advice above.

Add to that: can you hear the fuel pump humm when the key is in the 'run' position?

Does it sputter, or fire off at all?