Limp mode after ps2 turbo and other mods

bimmerislife · 04-27-2016, 10:21 AM

Hey guys. I just got a ps2 turbo, fuel it port injection, n20 tnap sensor, fuel it stage 2 lpfp and jb4 iso and other minor mods on my 2012 e92 335i xdrive n55 engine. I am fbo and have e20 in the tank, PI is turned off and i do not have a BEF because cobb doesent support my firmware. I was on map 1 cruising on the freeway in 6th gear hardly accelerating and it went into limp mode with the half engine light and the yellow hoist light. The car would crank but wouldnt start so I reset my ekp module by taking the wires out and putting them back in. This made the car able to start again so i kept driving and it happened again in 3rd gear this time. It seems to only happen when my oil is warmed up all the way. When it isnt, i can go wot and hit 16-17 psi with no problem. The codes i got were,
2C90- blow off valve mechanism- ignore, tuner code
2C01- low fuel pressure(i believe)
2BE9- low hpfp pressure (i believe)

Has anyone experienced this before? Any tips? I have a log that was running when it went into limp mode but it says invalid file-.- let me know if you would like to see it and i can email it! The dealersip checked my injectors the other day and they are running fine. Please help, it sucks when you have a bunch of parts to make your car fast but it doesent want to work

deemarr 335i · 04-27-2016, 02:35 PM

Sounds like lpfp install issue maybe

Cory S · 04-28-2016, 12:27 AM

Quote:

Originally Posted by deemarr 335i

Sounds like lpfp install issue maybe

Agreed...

bimmerislife · 04-28-2016, 12:07 PM

hmmmm. what part of the install could have been installed improperly?

deemarr 335i · 04-28-2016, 12:49 PM

maybe a hose kinked or caught on something

deemarr 335i · 04-28-2016, 12:51 PM

and your getting lpfp codes, i doubt its a bad pump

mike@x-ph.com · 04-28-2016, 05:17 PM

Recommend you send the logs to fuel-it

BKBMW335I · 04-29-2016, 12:13 AM

I can guarantee that it is either the lpfp or the fact that you are running Ethanol, run out what's in your tank and then refill with straight 93 or 91 if that's all you have then go WOT and see if you go into limp mode.

If you don't then you will know that your problem is related to using E and that if you are going to run E then you need an aftermarket lpfp.

I had the same problem recently and though I'm not running a PS2 adding a little bit of E and boosting with the Cobb STG 2 Aggressive had me running on half engine but once I emptied the tank and went with straight 93 PU I didn't have any problems with going into limp mode.

Cory S · 04-29-2016, 12:17 AM

You shouldn't need a LPFP upgrade unless your hitting 430whp on gas, or 380whp on an E30-40 blend.

Cobb Stage 2 aggressive FMIC on a good day (rare) is about 308-320whp on the N55 on gas.

bimmerislife · 04-29-2016, 10:11 AM

I do have a fuel it stage 2 lpfp :/ terry has been helping me and gave me some idea. Thanks for the kinked hose tip also!

04-27-2016, 10:21 AM	#1
bimmerislife New Member 4 Rep 22 Posts Drives: 2012 fbo 335i xdrive e92 n55 Join Date: Aug 2015 Location: michigan iTrader: (0)	Limp mode after ps2 turbo and other mods Hey guys. I just got a ps2 turbo, fuel it port injection, n20 tnap sensor, fuel it stage 2 lpfp and jb4 iso and other minor mods on my 2012 e92 335i xdrive n55 engine. I am fbo and have e20 in the tank, PI is turned off and i do not have a BEF because cobb doesent support my firmware. I was on map 1 cruising on the freeway in 6th gear hardly accelerating and it went into limp mode with the half engine light and the yellow hoist light. The car would crank but wouldnt start so I reset my ekp module by taking the wires out and putting them back in. This made the car able to start again so i kept driving and it happened again in 3rd gear this time. It seems to only happen when my oil is warmed up all the way. When it isnt, i can go wot and hit 16-17 psi with no problem. The codes i got were, 2C90- blow off valve mechanism- ignore, tuner code 2C01- low fuel pressure(i believe) 2BE9- low hpfp pressure (i believe) Has anyone experienced this before? Any tips? I have a log that was running when it went into limp mode but it says invalid file-.- let me know if you would like to see it and i can email it! The dealersip checked my injectors the other day and they are running fine. Please help, it sucks when you have a bunch of parts to make your car fast but it doesent want to work
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04-27-2016, 02:35 PM	#2
deemarr 335i Lieutenant 34 Rep 410 Posts Drives: e90 335i performance edition Join Date: Jan 2012 Location: westchester ny iTrader: (2)	Sounds like lpfp install issue maybe
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04-28-2016, 12:07 PM	#4
bimmerislife New Member 4 Rep 22 Posts Drives: 2012 fbo 335i xdrive e92 n55 Join Date: Aug 2015 Location: michigan iTrader: (0)	hmmmm. what part of the install could have been installed improperly?
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04-28-2016, 12:49 PM	#5
deemarr 335i Lieutenant 34 Rep 410 Posts Drives: e90 335i performance edition Join Date: Jan 2012 Location: westchester ny iTrader: (2)	maybe a hose kinked or caught on something
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04-28-2016, 12:51 PM	#6
deemarr 335i Lieutenant 34 Rep 410 Posts Drives: e90 335i performance edition Join Date: Jan 2012 Location: westchester ny iTrader: (2)	and your getting lpfp codes, i doubt its a bad pump
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04-28-2016, 05:17 PM	#7
mike@x-ph.com BimmerPost Supporting Vendor 27133 Rep 196,286 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	Recommend you send the logs to fuel-it __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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04-29-2016, 12:13 AM	#8
BKBMW335I Captain 160 Rep 772 Posts Drives: '11 E93 335I Join Date: Aug 2015 Location: Land of OZ, Kansas iTrader: (0)	I can guarantee that it is either the lpfp or the fact that you are running Ethanol, run out what's in your tank and then refill with straight 93 or 91 if that's all you have then go WOT and see if you go into limp mode. If you don't then you will know that your problem is related to using E and that if you are going to run E then you need an aftermarket lpfp. I had the same problem recently and though I'm not running a PS2 adding a little bit of E and boosting with the Cobb STG 2 Aggressive had me running on half engine but once I emptied the tank and went with straight 93 PU I didn't have any problems with going into limp mode. __________________ Mods: MHD Stg 2, xHP Flashtool Stage 3, VRSF 3" Chargepipe, Megan 4" Downpipes, Pure N55 Inlet, Outlet, VSRF 5" Stepped Intercooler, GFB Diverter, BMS N55 Intake, Michelin Pilot Super Sport Tires, BMS Sport Oil Cooler Valve, CF Spoiler, CF Kidney Grille, CF Mirror Covers, CF Eyelids, CF Wheel Hub Covers, CF Diffuser, M Sport Racing Strip, 20% Tints, and Golf Tee Mod
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04-29-2016, 12:17 AM	#9
Cory S Major 306 Rep 1,163 Posts Drives: 2011 335i-X Join Date: Oct 2015 Location: N.H. iTrader: (0)	You shouldn't need a LPFP upgrade unless your hitting 430whp on gas, or 380whp on an E30-40 blend. Cobb Stage 2 aggressive FMIC on a good day (rare) is about 308-320whp on the N55 on gas.
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04-29-2016, 10:11 AM	#10
bimmerislife New Member 4 Rep 22 Posts Drives: 2012 fbo 335i xdrive e92 n55 Join Date: Aug 2015 Location: michigan iTrader: (0)	I do have a fuel it stage 2 lpfp :/ terry has been helping me and gave me some idea. Thanks for the kinked hose tip also!
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