Hey guys i was wondering does any one know where the fuel regulator is on a 2002 subaru wrx impreza, is it inside the tank?

front of the manifold. drivers side. on the fuel rail.

you dont need to modify it.

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Long live the WRC

If i turned it up to alow more fuel flow will it screw up my tune?

its not adjustable. simple vacuum diaphragm and spring. It doesn't matter how much flow there is, within reason. The injector's will still only open for the same length of time, therefore only injecting the same amount of fuel. You would need to get the tune altered for the injector's to open longer at a given rev/load to gain a benefit. but you can't adjust it anyway.

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F.B. Racing
01 WRX (STI badged)
2010 XR5 Focus
06 Impreza Hatch 2.0i

Face = Palm

ffs you make some stupid threads man, need to search before posting!

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2000 WRX - Grip King
1997 Sileighty - Gate Monster

You can crush the can to increase the pressure, if you know what your doing....... The OP doesn't know what he's doing so don't mess with it.

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Hey guy you should read the instruction book carefully and not modify any thing with out any info about that one.....
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Crackpipe down