Misfire/Hiccup on Cold Idle

Vesrah · 03-23-2015, 12:30 PM

I've got a 2011 335D with 75k miles on it and it's started to shudder/misfire/whatever you want to call it on cold starts. There is no SES light, car is bone stock. It'll start right up, then the idle hunts up and down about 100rpm with there is a vibration through the car. As soon as you take off it will hiccup for the short drive out my neighborhood and then it clears right up and acts perfectly. I do note that low amounts of throttle input are more responsive than normal during this time. Any ideas?

eurojulien · 03-23-2015, 12:35 PM

scan it with bmwhat, i'm sure there is a code back there already. I'm going to take a shot in the dark and say it's throttle/carbon buildup/injector issue

CO335D · 03-24-2015, 10:09 AM

Could also be your glow plug controller. Those seem to lose communication rather easily in these cars.

GreekboyD · 03-25-2015, 06:27 PM

I'm going with bad glow plugs.

Vesrah · 03-27-2015, 06:42 PM

Dealer said there were no codes and blamed it on carbon build up. Not covered by third party warranty.
So begins the adventure.

TorqueAddict · 03-27-2015, 07:21 PM

Quote:

Originally Posted by GreekboyD

I'm going with bad glow plugs.

^What he says. I believe there was a similar thread in UK forums, and the guy's issue was fixed replacing the glow plugs and controller.

Vesrah · 03-27-2015, 07:32 PM

I'll search after work to see if there is a way to test them. Dealer has my car until Tuesday; I've called another dealership that seems much more willing to help me out. We will see what the next week brings.

03-23-2015, 12:30 PM	#1
Vesrah New Member 0 Rep 16 Posts Drives: 335D Join Date: Aug 2013 Location: Arizona iTrader: (0)	Misfire/Hiccup on Cold Idle I've got a 2011 335D with 75k miles on it and it's started to shudder/misfire/whatever you want to call it on cold starts. There is no SES light, car is bone stock. It'll start right up, then the idle hunts up and down about 100rpm with there is a vibration through the car. As soon as you take off it will hiccup for the short drive out my neighborhood and then it clears right up and acts perfectly. I do note that low amounts of throttle input are more responsive than normal during this time. Any ideas?
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03-23-2015, 12:35 PM	#2
eurojulien Second Lieutenant 36 Rep 244 Posts Drives: 135i/6 Join Date: Feb 2013 Location: SF iTrader: (0)	scan it with bmwhat, i'm sure there is a code back there already. I'm going to take a shot in the dark and say it's throttle/carbon buildup/injector issue
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03-24-2015, 10:09 AM	#3
CO335D Second Lieutenant 26 Rep 218 Posts Drives: '11 335D Join Date: Oct 2014 Location: CO iTrader: (0)	Could also be your glow plug controller. Those seem to lose communication rather easily in these cars.
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03-25-2015, 06:27 PM	#4
GreekboyD Brigadier General 411 Rep 3,051 Posts Drives: 2009 BMW 335d Join Date: Jan 2012 Location: Toronto, ON, Canada iTrader: (0) Garage List 2009 BMW 335d [8.00]	I'm going with bad glow plugs.
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03-27-2015, 06:42 PM	#5
Vesrah New Member 0 Rep 16 Posts Drives: 335D Join Date: Aug 2013 Location: Arizona iTrader: (0)	Dealer said there were no codes and blamed it on carbon build up. Not covered by third party warranty. So begins the adventure.
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03-27-2015, 07:32 PM	#7
Vesrah New Member 0 Rep 16 Posts Drives: 335D Join Date: Aug 2013 Location: Arizona iTrader: (0)	I'll search after work to see if there is a way to test them. Dealer has my car until Tuesday; I've called another dealership that seems much more willing to help me out. We will see what the next week brings.
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