2001 Chevy S-10 Starts hard

Well ok this is what I did right, my dad and I went to do a tune up with plugs, fuel filter and the distributor cap and button thing that goes inside the distributor cap. When we took off the old dist. Cap we found that Firestone had broken the distributor and that the cap was held on with electrical tape. So in total we replaced the entire distributor and cap, the spark plugs and fuel filter. It still starts hard but not as bad as before. I found that if I turned the key to prime the engine once, turn the key off and then start the engine it starts fine.
I don't know how to test the fuel pressure. And it was throwing a few codes, I don't remember them all, there were 4. But one was a misfire and 2 of them were high coolant temp or something. But after we replaced the distributor and everything the light went out but like I said it still starts hard.