I was thinking about installing some new performance injectors, fuel pressure regulator, and fuel pump on my 2004 Eclipse GS. Does anybody know what all is involved with replacing stock injectors with performance injector? Do I have to rewire anything? Is there any chance that I will throw a code?

So... you want to add more fuel. Why? You think more fuel means more power?? Wrong.

I'm trying to upgrade everything on the engine that is not internal first. After that i plan to upgrade the cams, crank, and pistons. Once I get the engine beefed up some, I plan to put a turbo setup on it. You don't think new injectors, fpr, and fuel pump will help out performance wise?

No.

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ok, its hard to takes someone serious when there name is "3gdsmer" that in itself makes me want to punch myself.

and if you plan to turbo you won't need cams and what not. either "beef" up your engine naturaly or forced. not both. and with your car, either way after about 10 grand spent on those you'll still run slower then a VR4 (which you can buy for under 10 grand)

i realy try to discourage people from beefing up 3g's as they aren't that good of a platform for it. i mean you can, don't get me wrong there are a few that a fast as ****, but as far as cost effectiveness, they are not too good. its like trying to make a SOHC 3000GT fast. sorry bro, just not going to happen.

Air + Fuel + Spark = power

You have to add all of them.