1989 Ford Bronco Bronco has been siiting for 3 yrs.

My 89 bronco has been sitting for 3 yrs. But it was running perfect before I let it sit. Now it wont start of course from sitting for so long. I had no fuel pressure so I pulled out the gas tank. I cleaned out all the black gas, sediment and crude in the tank. Replaced my fuel pump and filter. Pulled out my fuel injectors and cleaned them to where they were spraying a cone mist. Flushed my fuel lines with compressed air. I installed everything and now my fuel pressure is perfect. I replaced my spark plugs, wires and distributor cap and it still wont start. So what do you think the problem could be. Thank you for the help. And I apologize for not donating I'm poor without a job right now but thank you again