Nameless RB26

Setup:

2000 Civic Si B16a2
Drag turbo setup 7 psi

This FMU seems to be causing surging problems when accelerating. It's a 12:1 vortech. I know for a fact this is because of the FMU, because I've ran the car without the FMU and all is fine. I also used a different FMU on it before, and it worked fine. Although that original FMU is gone because I needed it for a different car..

This one seems to be giving shitty acceleration problems, surging and such. Apply throttle and the car lags like it's not getting fuel, then it plays catchup and lags again continiously.

The vacuum source is setup perfect, there are no leaks. Can the lines be backwards perhaps? I swapped them once because of this problem and it seemed fine afterwards, now a few drives later it's doing the same surging ****.

Anyone have any advice? Am I using the correct FMU for this setup? Maybe that's what the problem is. Advice please? Thanks

91tegrals

sounds like a fucked fmu not sure were to tell you to look...

Mr T

Make sure you have the fuel lines hooked up right ... the one in the middle bottom goes to the fuel return line to the tank ... the other to the fuel pressure regulator
Hope this helps.

Nameless RB26

fixed the problem.. wasn't the FMU. The fuel hose from the stock regulator to FMU wasn't tight enough so it was spraying slight amounts of fuel out under boost. makes sense. Hose clamp helped