that is one of the things I mentioned was fuel pressure regulator, but clogged fuel filter, fuel pump going out not pumping to the right psi and regulator are all same type of symptoms but regulator is cheaper and easier, I had an s10 6 cyl. did the same thing, fuel injectors were a poor desighn and were recalled, so they ended up plugging with carbon, so after I did that the fuel pump went a few weeks later, then the pressure regulator 1 week after, what a nightmare..... then 2 weeks later I totaled it lol