so I have a b20 from a 2000 crv I did a little turbo build over the winter 50mm turbo 10 psi. I have a walboro 255 fuel pump aem high flow fuel rail aem adjustable fpr rc 440cc injectors also my ecu is a p04 with hondata s300v3. so whats happening is when I start up fuel pressure on the gauge on the fuel rail says about 33 car seems to run fine but once I start driving for a little bit the psi drops to about 19 or 20 and the car wants to almost die and has died when going into neautral and idles very low.
please help

 

sound like something in the system cannot keep fuel pressures up properly (your car uses more gas when there is a load)

you sure the walbro 255 is genuine? lots of fakes out there, unless its relatively new and you are sure its genuine I would start there
ive had my walbro 255 for 5+ years and im currently over 400HP on my current build and no issues whatsoever, but im also confident its an authentic pump

 

that was something I possibly thought I'm not sure its a genuine walboro I got it off ebay so possibly a fake. I will start with a brand new fuel pump

 

problem solved put new fuel filter in made no difference obviously so went and got a new fuel pump when I pulled my pump out of tank I notice the rubber feed tube was almost off the pump put it back on tightened clamp and now fuel pressure is 42 now for a re tune now that I actually have fuel pressure I'm running way to rich