SweetZRag

I need some advice. My car is occasionally hard to start and it will idle rough until you get on it a little. The problem will go away before closed loop engages so I don't think it is related to O2 sensors.

I have replaced the obvious and it is better but still not right. I replaced the Opti (definetely bad, threw a code), the wires, plugs, coil, etc. I am holding fuel pressure and the can not find any vacuum leaks.

The car has some mods as shown below but is stock for the most part. The car has 260K miles and has no other problems.

I now suspect the fuel injectors and wanted to know if I should stick with stock size or something better. This is a daily driver but I am always interesting in something a little better if simple to do. What should I get for injectors and does anybody have ideas about the hard start/rough idle?

Thanks,

Jeff