Odd startups in cold weather

mtowle182 · 01-04-2015, 05:22 PM

So I've had the car for a few months, everything has been fine except recently I've been having a few long starts or low rpm ones like this. It is a littler colder where I live now (dropping into the 40s at night) but It doesn't seem cold enough for that to be the factor. Is this the HPFP starting to shit the bed? This start is two hours after driving it for about 15 minutes.
Also, when the engine has been running for only a few minutes and the temperature gauge hasn't moved, when I accelerate to like 4k rpm holding the gear, the rpms quickly drop to about 2k when I let off of the gas and then back to 3k or so in a bouncing motion.

Gray_Panther · 01-05-2015, 08:47 AM

Any misfires or codes being thrown?
Also what octane gas are you using?

Mach1er · 01-05-2015, 09:40 AM

Did it start after a recent fill-up? Could be a bad batch of gas.

IEDEI · 01-05-2015, 10:15 AM

could also be fuel injectors!

mtowle182 · 01-05-2015, 10:24 AM

Using 93 octane (Baltimore) . I've been trying like every gas brand and it's still happening. I have cpo so I guess I'll take it in, was just trying to see if there was anything I could do. And no codes or misfires I believe.

mtowle182 · 01-05-2015, 10:54 AM

Quote:

Originally Posted by IEDEI

could also be fuel injectors!

any way to investigate this, or just take it to the dealer?

Mach1er · 01-05-2015, 11:06 AM

Quote:

Originally Posted by mtowle182

any way to investigate this, or just take it to the dealer?

Pretty sure you'd be throwing codes if you had bad injectors.

mtowle182 · 01-05-2015, 11:12 AM

Quote:

Originally Posted by Mach1er

Pretty sure you'd be throwing codes if you had bad injectors.

Yeah that makes sense. Just checked and didn't see any codes. Would I need a code reader or would they show up in the cars check control?

01-04-2015, 05:22 PM	#1
mtowle182 Private First Class 17 Rep 101 Posts Drives: 2009 135i Join Date: Aug 2014 Location: Maryland iTrader: (0)	Odd startups in cold weather So I've had the car for a few months, everything has been fine except recently I've been having a few long starts or low rpm ones like this. It is a littler colder where I live now (dropping into the 40s at night) but It doesn't seem cold enough for that to be the factor. Is this the HPFP starting to shit the bed? This start is two hours after driving it for about 15 minutes. Also, when the engine has been running for only a few minutes and the temperature gauge hasn't moved, when I accelerate to like 4k rpm holding the gear, the rpms quickly drop to about 2k when I let off of the gas and then back to 3k or so in a bouncing motion.
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01-05-2015, 08:47 AM	#2
Gray_Panther Brigadier General 1555 Rep 3,234 Posts Drives: 128i Join Date: Jun 2012 Location: Upstate NY iTrader: (0)	Any misfires or codes being thrown? Also what octane gas are you using? __________________ 2012 BMW 128i 6MT Deep Sea Blue Metallic
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01-05-2015, 09:40 AM	#3
Mach1er Lieutenant 88 Rep 524 Posts Drives: '13 128i Join Date: Mar 2013 Location: Austin, TX iTrader: (0)	Did it start after a recent fill-up? Could be a bad batch of gas. __________________ '13 128i \| 6MT \| SGM \| Black Boston \| Black Gloss \| Lighting \| Premium \| Tech \| HK \| Anti-Theft \| [CDV-Delete \| Clutch Stop \| 30% Pinnacle] Ordered 2.23 \| Production Begin 3.7 \| Ends 3.15 \| Released to carrier 3.18 \| At port 3.19 \| Departed 3.23 (K-line to Brunswick) \| Arrived 4.7 \| Truck 4.12 \| Dealer 4.19
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01-05-2015, 10:15 AM	#4
IEDEI Banned 1130 Rep 4,686 Posts Drives: L'Orange Join Date: Jul 2013 Location: Brooklyn, NYC iTrader: (0) Garage List 2011 BMW 1M [8.40]	could also be fuel injectors!
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01-05-2015, 10:24 AM	#5
mtowle182 Private First Class 17 Rep 101 Posts Drives: 2009 135i Join Date: Aug 2014 Location: Maryland iTrader: (0)	Using 93 octane (Baltimore) . I've been trying like every gas brand and it's still happening. I have cpo so I guess I'll take it in, was just trying to see if there was anything I could do. And no codes or misfires I believe.
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