i just got a set of injectors because one of my injectors finally pretty much puked on me, and from what i could find out and a bunch of people telling me different things, i thought my 2000 stang came with 21 lb injectors. so i got 21 lbers supposedly, take mine out and they have the yellow tips on them, and the ones i bought had a greyish.

so my question, are the yellow tip injectors 19 lbs?

and do i need to get a new tune for these injectors now that i have them in?

 

If they are different injectors, you will need a tune. As for the knowing all about injector colors and such, I couldn't tell you. GL

 

This is the color code for the 5.0 windor motors, I believe the V6s aren't coded though.
Yellow = 19
Light Blue = 24
Red = 30
Brown = 36
Green = 42
Black = 50

Here is a link to a site that sells all ford fuel injectors, look and compare to see if any of them look the same to you.
http://www.fiveomotorsport.com/Injector_SetsFORD.asp