N54 Fuel Pressure spiking!

[Turbotimer]

Hi guys so Im a total noob at forums lol. but here it goes

I have a 2010 BMW 135i and the fuel pressure is all over the place. I read on here people with similar issues but they're running PI, my car is on DI only with a Helix overdrive on full e85.

My current fuel setup is:

Helix Overdrive
Precision Raceworks Stage 3 Bucketed Fuel pump
Speedsty EKPM Upgraded board with Dual Relay

Can anyone help me shed some light on this issue please?

 

[whyzee125]

Is your HPFP or LPFP spiking? I believe the Speedsty is non-PWM controlled, meaning even when only the main pump is running, it's running at 100%. You'll end up with high fuel pressure when cruising because of this.

 

[Turbotimer]

Is your HPFP or LPFP spiking? I believe the Speedsty is non-PWM controlled, meaning even when only the main pump is running, it's running at 100%. You'll end up with high fuel pressure when cruising because of this.

My lpfp is all over the place under wot. I've seen people on here having the same issue but they have port injection and there's a fix for it with a PI but I'm still on just DI.