Can fuel injectors cause a misfire?

 

yes

 

Yes. You can ask your browser for more information.

 

Yes, so can bad spark plugs and bad compression.
Personally I would try spark plug, then compression test, and lastly injector if the other two aren't the problem.

 

Here's where I am now. I've replaced the coil pack and the spark plug. I went to the parts house to buy a fuel injector. The counter person suggested I try a bottle of injector cleaner which I did. Filled my gas tank and added cleaner. Cleared codes, drove about 15 miles and had no codes but the engine still had a miss. Now I'm beginning to worry.

 

if this happens to you in the future, there is/was no reason to buy parts before diagnosing the issue.

Did you save orig coil and plug ?

 

I did save the plug but not the coil, the mounting bolt hole broke off when the spark plug worked loose and blew it out.
I reused the spark plug and installed a new coil

 

Well if the check engine light was coming on before, but not now, I would guess you have misfires on another cylinder.
Just not bad enough to make the check engine light come on.

 

So can a leak at the intake manifold causing a lean miss. Nice thing is he can swap components between a good and the bad cylinder, recheck codes and see if the code set follows parts or stays with the same cylinder without any money being spent.

 

After checking the compression on the dead hole go ahead and replace the injector if the compression is good
An intake leak will generally affect all the cylinders, or at least all on one bank
I see bad injectors constantly on the post 99 style
I see the solenoids failing, and if you apply power and ground to a faulty injector, you get no click