need help with which injectors I have on my stang.

well I bought the car about 3 weeks ago and am still doing mods to it. Well I noticed the maf meter says its a 2L24 and it has some other id #'s on it as well, but I think the 2L24 means it is calibrated for 24# injectors. I then took a look at my injectors and they are the yellowish/orange looking ones. I think these are the stock 19# ones. The only thing it says is:
Denso on one side and
F1ZE - C2A.

Can anyone tell me if these are the 19# injectors?

My 94 mustangs 24# injectors were blue. Not sure if the color has anything to do with it or not, especially considering mine were ford motorsport and these are made by Denso. Any help with this would be great.

If these are the 19# injectors can I just swap mine old 24# ones in? The only thing is that mine have been sitting for like 2 years, but they were new when I pulled them out of my last stang. I was thinking about just getting them ultrasonic cleaned. Does this really work and how much cheaper is it to do that vs buying new ones?

thanks.

thanks for the reply. I guess that would make sense why I am having slight idling problems, not very bad though. I would think it would be worse.

well they were kept in the garage. $86 hmmm, not bad. I guess that is what I will do then. thanks