Really rough idle only about 450 rpms and no throttle response fuel is coming out of the injectors but no clue on what could be the problem.. Help!!

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I have a 12v if the p pump swap would be easier and cheaper, any input would be great and much appreciated.

 

many guys do the swap and like it. its a lot more work than just replacing a vp though. i kinda like the idea of never worrying about the vp again. this is only my opinion.

 

I'm not entirely positive where to even began, but first off, what mods, how many miles, and did anything happen to lead up to it? Like, any tell tale signs that happened before it happened?

 

I ran the codes they are p0251 p0252 and p1688 which means Im in need of a new vp44 thankyou for your input.

 

that or your lift pump could also be the problem if its a stock in-tank pump,