BMW 3-Series (E90 E92) Forum - View Single Post - Problem: n55 no power, building 0 boost. No codes! Help!

hetzle · 01-10-2013, 02:50 PM

Long story short: Had the JB4 removed, car drives perfectly fine, no limp modes and seems to be boosting properly (at stock levels). I'll be putting it back in after I finish my last quarter of college and doing some data logging for Terry to determine what/if something went wrong with the unit.

Car hooks perfectly in 1st gear now (I'm running brand new Michelin Pilot SuperSports) thanks to the reduced power, but doesn't sound quite as good. I definitely notice the reduced midrange torque, and quieter BOV noise. Already missing the JB4 =/

01-10-2013, 02:50 PM	#44
hetzle First Lieutenant 32 Rep 373 Posts Drives: E90 335i Join Date: Dec 2011 Location: San Francisco, California iTrader: (0)	Long story short: Had the JB4 removed, car drives perfectly fine, no limp modes and seems to be boosting properly (at stock levels). I'll be putting it back in after I finish my last quarter of college and doing some data logging for Terry to determine what/if something went wrong with the unit. Car hooks perfectly in 1st gear now (I'm running brand new Michelin Pilot SuperSports) thanks to the reduced power, but doesn't sound quite as good. I definitely notice the reduced midrange torque, and quieter BOV noise. Already missing the JB4 =/ __________________ 2011 335i sedan 6MT, 515whp/530wtq. Pure Turbo Stage 2, Motiv SST TwinDisk Clutch/FW, Motiv Flash, AA 4" DP, ER FMIC, AA turbo-back exhaust, Quaife LSD, ST Coilovers, BMS Intake, UUC DSSR+SSK, ER CP, BMS CDV, BMS OCC, Arkym CF trunk
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