running rich since new fuel pump

goshko

New Member
Hi guys, I was hoping someone could guide me through this. Ever since I have installed my walbro 255 fuel pump, the car has been very hard on fuel consumption and I could hear explosions in the exhaust way more often then I use to. I have put my doubts on maybe a new fuel pressure regulator ? Has anything like this ever happen to anyone ? Btw, before the new pump all was good and I am running stock boost stock everything just walbro fuel pump.
 
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