cdefftone33

Hey guys! I have a 97 with an 02 4.6,,,,my question is,,, i have bigger fuel injectors, can i just install them and my car will recognize them, or do i have to take it to the shop???

uberstang1

Not 100% sure, but i think you need to change your fuel injector size with a handheld.

04BlueGT

Your maf has to be calibrated for the new injector size.

04mineralgreyGT

+1, they aren't going to do anything for you if you have just a "bolt-on" PI 4.6L. Does your engine have the factory injectors in it? If so leave tham there and save the bigger ines for when you install a power adder, if you do.

Quicktime_GT

right...

bigger injectors does not work like a bigger carburetor... An injector size has a limit to the amount of fuel it can deliever based on how much fuel your computer decides you need. A bigger injector will not deliver more fuel all the time.. only when needed to, such as when spraying nitrous, or having massive amounts of extra air, like with a blower. The mass air meter needs to be calibrated to work with bigger injectors as well.

Bigger injectors on a bolt on car are really pointless, they are not needed, and will not show any gains. I think i've read 19 lbers are good up to about 300 hp er so. If you have an 02 you have the pink 21 er so lb injectors which i'm sure are good up to at least 300 too. More than likely without taking the valve covers off you'll never max out your factory injectors n/a.