Will a bad fuel injector cause a car to have a miss, I have a 87 5.0 basically it a street car everyday back and forth to work kinda car, but will clown if need to, what I'm asking if an injector would cause a miss when replacing those injector which injector will be the best for the money. In search of the miss I've changed wires, plugs, rotor, checked vacuum hoses, someone says its running rich in the fuel try replacing injectors so thats where I'm at.

 

a lot of things will cause a car to run rich

I would test to tell me more. KOEO and KOER. Maybe try a wiggle test too. My car ran rich for the longest. I put some contact grease on the engine coolant temp sensor and all my codes went away.

Your sure you don't have a wire crossed?

Also, do you have the plugs that came out? What did they look like?

I almost forgot, you can also run a test to see which clyinder is out of balance.