was speaking to someone earlier today abt my FRST on cossie management it was running 803s and a 3 bar and a ciustom chip, however it was overfuelling like a coont. i have cahnged it all back to std yellows 2 bar etc, and im having a chip re written for it. one thing i never checked was the fuel pressure, how do i adjust ? would this cause the symptoms?

cheers L

 

are you using the standard frst regulator on the end of the fuel rail?

 

If the pressure is higher than the chip was wrtitten for/to have then yes it will overfuel.
INJECTOR OPEN TIME + PRESSURE = QUANTITY of fuel.
tabetha