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Unicorn here: 2011 F25 N55 96K miles, production date 201102
I hope this post helps others in the same lurch.
My X3 has been starting hard for the last 18 months. Started stalling and going into limp mode more recently. My Autel scanner was reading 45ish PSI low pressure, 2,300+ PSI high pressure under load.
Replaced lpfp in tank with a Walboro 450 (to future proof) and still starts hard, still idles rough but no more stalls. Autel now reads 101.53 low side psi and doesn’t change during live feeds. In fact, never changes. I figured it’s time to replace the low pressure fuel sensor on the feed line.
Just popped off the intake and…. no sensor on the feed rail.
I saw a youtube video by The 50’s Kid where he’s changing it our on an e90 and he mentions that some BMWs use a chart or something?
Anyway, for ZeBoost, get the Walboro 450 kit and I’m sure you’ll be feeding the hpfp with plenty of gas so it doesn’t have to suck it out. (Also, I strongly suggest getting an $18 lock ring opener from Amazon. Best money you’ll ever spend).
Any other information on how these cars are getting low pressure data would be greatly appreciated.
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