Thanks for the reply.

MazdaMazda,

Which shop sells one (fuel pressure regulator), I asked around and no one knows one for Mazda, for honda lang daw and 3Kphp pa.

I'll be using some sort of fluid to clean the injector first though since this will only cost me a 100php a pop.

Doc Eric,

The AC vacuum switching valve is the one that makes the idle go higher from time to time right? It still does work.