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Stoolz Stoolz is offline
Senior Member
Posts: 886
Join Date: Jan 2015
Car: 11 135i
Default hpfp oscillating - 07-23-2019, 09:40 PM

Hi brains trust.

Anyone know why my hpfp is oscillating like crazy?
It's not lpfp. I have them powered up direct and enough lp for 1000whp. Its not the fuel lines either they are all new, as is the hpfp.
As you can see afr follows it.
Don't know why the ECU would be doing this if that's the case.
My car has had an issue for YEARS now, might be tracking it down now I hope.

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2011 135i Dct coupe Alpine white n blacked out.
VTT DBB,Pure Inlet, JB4,GFB DV+,MHD,Fuel-it Platinum PI with Cm 5 - 50:50 Meth, E85, N20 tmap, Fuel It S2 lpfp, KB Boost A Spark, BMS IC /CP / IT / OCC, SG Boost Pipe, Quaife LSD, Federal RS-RR,M4 Flywheel, SSP R spec clutches, Kw V3 & Pro rolled guards, AR CL **, Bmw PE. Custom mi**ipe kitties. 1000wrms custom audio.
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