Startup

redz06 · 02-08-2015, 07:36 PM

In cool weather on startup, my 2008 335i (N55) needs a bit of throttle to start up. Cool weather in Fulshear is 40 degF. None of my other fuel injected cars has ever required this. Is something wrong, or is this normal for a N55? It acts more like it has a carburetor rather than fuel injection. Otherwise the car is 100% normal and runs great.

Douche · 02-08-2015, 08:07 PM

Fuel pump is dying...

adeljobran718 · 02-09-2015, 01:39 AM

2008 n55?

55Nomad · 02-09-2015, 03:54 PM

Quote:

Originally Posted by adeljobran718

2008 n55?

+1

In any case, not normal.

KeepRidingDirty · 02-09-2015, 04:13 PM

This could be so many things, HPFP, LPFP, Injectors, Plugs, Coils, Clogged Filter, the list goes on.

Johnny Boost · 02-09-2015, 04:31 PM

What do you mean it needs a bit of throttle? You hit the accelerator while you cold start your car? What happens if you don't hit the accelerator?

redz06 · 02-11-2015, 10:21 PM

Well, engine sounds like if I don't hit the throttle that it will just keep on cranking until the battery expires. I will try it again tomorrow morning and verify. With all of the other FI cars I own, I would not have to het the throttle at all to start the engine.

The car is out of warranty with 58000 miles. Every thing else works perfectly.

GoRomeo · 02-11-2015, 10:37 PM

Sounds to me like a leaky injector.

humbertob · 02-11-2015, 10:39 PM

Sounds to me like a faulty HPFP

redz06 · 02-12-2015, 08:27 PM

Sorry, don't know where my head is. My car is a 2011 BMW 335i with the N55 motor. I have owned it since new (ED). Last winter when it was still in warranty, I started getting long cranks but it would still start and the dealer was not able to find anything wrong. When the weather got warmer, the phenomenon went away, so I thought, why pay BMW money to chase after the issue when the issue was gone. Now my warranty is gone as well and the long cranks have returned. I have never seen the dreaded half motor and the car has always eventually started. This morning was a very long crank. I thought it would not start, but eventually it did. This afternoon it cranked fine. What's up? I will not be buying a new M3 if BMW hoses me on this one.

02-08-2015, 07:36 PM	#1
redz06 Private First Class 24 Rep 185 Posts Drives: 2011 335i sedan Join Date: Oct 2011 Location: Fulshear, TX, US iTrader: (0)	Startup In cool weather on startup, my 2008 335i (N55) needs a bit of throttle to start up. Cool weather in Fulshear is 40 degF. None of my other fuel injected cars has ever required this. Is something wrong, or is this normal for a N55? It acts more like it has a carburetor rather than fuel injection. Otherwise the car is 100% normal and runs great.
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02-08-2015, 08:07 PM	#2
Douche Banned 466 Rep 1,980 Posts Drives: Car Join Date: Jan 2015 Location: Location iTrader: (0)	Fuel pump is dying...
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02-09-2015, 01:39 AM	#3
adeljobran718 Private 5 Rep 83 Posts Drives: 2007 335i coupe Join Date: Apr 2014 Location: hawaii iTrader: (0)	2008 n55?
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02-09-2015, 04:13 PM	#5
KeepRidingDirty Professional Monkey Trainer 65 Rep 423 Posts Drives: 2007 BMW 335xi Join Date: Aug 2014 Location: Ottawa, On iTrader: (1)	This could be so many things, HPFP, LPFP, Injectors, Plugs, Coils, Clogged Filter, the list goes on. __________________ JB4 G5 ISO / ER Charge Pipe and Tial BOV / Wagner FMIC / CYBA Tips & Air Scoops / AFE DCI / BMW PE Exhaust Mod / M3 Rep Bumper / Dynavin E9x
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02-09-2015, 04:31 PM	#6
Johnny Boost Colonel 324 Rep 2,014 Posts Drives: '21 M850i GC Join Date: May 2013 Location: TBD iTrader: (0)	What do you mean it needs a bit of throttle? You hit the accelerator while you cold start your car? What happens if you don't hit the accelerator? __________________ WedgePerformance E40 MHD \| Performance Exhaust Mod \| BMS DP \| Vibrant 1790 \| BMS Intake \| VRSF CP \| xHP Stage 3 Michelin PSS \| M3 Control Arms LUX v4 LEDs \| Shadowline Grills \| Lip Spoiler
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02-11-2015, 10:21 PM	#7
redz06 Private First Class 24 Rep 185 Posts Drives: 2011 335i sedan Join Date: Oct 2011 Location: Fulshear, TX, US iTrader: (0)	Cold Startup Well, engine sounds like if I don't hit the throttle that it will just keep on cranking until the battery expires. I will try it again tomorrow morning and verify. With all of the other FI cars I own, I would not have to het the throttle at all to start the engine. The car is out of warranty with 58000 miles. Every thing else works perfectly.
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02-11-2015, 10:37 PM	#8
GoRomeo Brigadier General 964 Rep 3,854 Posts Drives: 330i, 135i Join Date: Feb 2006 Location: San Diego CA iTrader: (0) Garage List 2008 BMW 135i [9.50] 2006 330i [6.75]	Sounds to me like a leaky injector.
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02-11-2015, 10:39 PM	#9
humbertob First Lieutenant 132 Rep 318 Posts Drives: '16 BMW M235i Join Date: Jan 2013 Location: Laredo, Tx. iTrader: (0)	Sounds to me like a faulty HPFP __________________ (OO)-(////)(\\\\)-(OO) '16 F22 M235i '19 G01 X3 \| Wife's '15 F30 335i M-Sport \| Son's '10 Porsche Boxster
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02-12-2015, 08:27 PM	#10
redz06 Private First Class 24 Rep 185 Posts Drives: 2011 335i sedan Join Date: Oct 2011 Location: Fulshear, TX, US iTrader: (0)	Startup continued Sorry, don't know where my head is. My car is a 2011 BMW 335i with the N55 motor. I have owned it since new (ED). Last winter when it was still in warranty, I started getting long cranks but it would still start and the dealer was not able to find anything wrong. When the weather got warmer, the phenomenon went away, so I thought, why pay BMW money to chase after the issue when the issue was gone. Now my warranty is gone as well and the long cranks have returned. I have never seen the dreaded half motor and the car has always eventually started. This morning was a very long crank. I thought it would not start, but eventually it did. This afternoon it cranked fine. What's up? I will not be buying a new M3 if BMW hoses me on this one.
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