Hi everybody,

I've finished a few week ago my k20a dc5 swap on my eg6 and the biggest problem that I have is the fuel pressure issue.

I have tested with an edelbrock (the video shown) FPR, and 2 aeromotive, and it happens the same all the times, when cold, the engine starts perfectly and you can rev it and the pressure stays at 55 psi, but when you start riding the car, the fuel pressure starts falling more and more... But if you stop the car, turn off the key and start it's again, the pressure keeps OK for some seconds and the cars runs perfectly, but it falls again after some time...


In the video is shown, idling the fuel pressure is ok but when you rev it falls... and as I said I have tested with 2 different walbro 255lph fuel pumps and 3 FPR...


Many, many thanks!

 

bumpp

 

is the fuel pump getting enough voltage?
Not sure on hondas but on my Gtr & evo we ran a 10gauge wire to a relay then into the pump to keep the fuel pump with enough power,

 

Hey man sorry for the 3 year late bump but did u ever fix ur issue? I have a similar issue on my k swapped teg. Got hard hot restarts due to fpr indicates fuel pressure drop when parked... Didn't realize it was for some time cus the needle would get stuck at 52psi on the paper... Lol thinking possibly fuel pump check valve? (Does Honda pumps have these at the pump?) I got a walboro 255 as well and AN piping and fittings to a golden eagle fuel rail. Did I miss a part for the pump swap?? It also fluctuates motor speed pitch when signals on 😅 Had a charging input issue before at the pcm. Also don't have IACV so idle screw adjustment is hard to perfect on the 70mm s2 b series t.b.( for benefits of b series TPS) lead me to get sticking issues... and Input would be kindly considered. Thx also got k pro, it's a k20z1 type s, the tune is kinda decent with a similar basemap to my car, stock inj. Rbc intake, cheaply hondata gasket, and r crew header to 3 in exhaust. (Tunes for a k20a2 as well, which doesnt have the jdm itr dc5 cams and 4.7fd too)
thanks I can send data logs and videos soon