Cold start shudders and shake.

bavarianboar · 08-01-2014, 02:23 AM

Noticing this recently on my car.

Mid day, 72 degree F temperature, the car is parked at work for like 5 hours and when I am leaving the evening, the car shudders and shakes (left-right kinda vibration).

The engine seems to sound like it will stop running at any point of time and is barely keeping alive. Don't notice much movement in the RPM needle. Same thing happens in the morning (outside temperature 65-68 degree F)

Any ideas why this would be happening?

My car is 9.5 months old with 10K miles on it.

F30 335i M sport. To be honest, had been a bit of a nightmare, given all the problems I have already seen.

Thank you guys!

avantix · 08-01-2014, 09:04 AM

Sounds like a defective or wonky MAF sensor. May or may not have registered a fault in the ECU. I can tell you reliability is not the F30's strong suit.

Philipangoo · 08-01-2014, 09:55 AM

Do you have an aftermarket intake ? If not yeah it's prob a problem with ur Air sensor that plugs into your intake. I would take it to the dealer

BeachsideF30 · 08-01-2014, 10:19 AM

You really cant catch a break with this car can u lol

bavarianboar · 08-01-2014, 12:35 PM

Quote:

Originally Posted by BeachsideF30

You really cant catch a break with this car can u lol

I think I got a lemon or the dealership who replaced the fuel sensor and tank messed up the car.

08-01-2014, 02:23 AM	#1
bavarianboar Lieutenant Colonel 332 Rep 1,771 Posts Drives: 2020 540i, 2020 430i Join Date: Mar 2010 Location: NorCal iTrader: (0)	Cold start shudders and shake. Noticing this recently on my car. Mid day, 72 degree F temperature, the car is parked at work for like 5 hours and when I am leaving the evening, the car shudders and shakes (left-right kinda vibration). The engine seems to sound like it will stop running at any point of time and is barely keeping alive. Don't notice much movement in the RPM needle. Same thing happens in the morning (outside temperature 65-68 degree F) Any ideas why this would be happening? My car is 9.5 months old with 10K miles on it. F30 335i M sport. To be honest, had been a bit of a nightmare, given all the problems I have already seen. Thank you guys! __________________ Driving: 2020 540i M-Sport Carbon Black, Ivory Nappa - Dec 2019 BTO - Feb 2020 Delivery Returned: 2016 535i M-Sport Carbon Black, Ivory Nappa :: 2014 F30 335i M-Sport Min Grey, Coral Red :: 2011 E90 328i Deep Sea Blue, Oyster Dakota
	Appreciate 0 Tweet Quote

08-01-2014, 09:04 AM	#2
avantix Captain 344 Rep 941 Posts Drives: 2019 M4CS Lime Rock Grey Join Date: Aug 2006 Location: Montreal iTrader: (6)	Sounds like a defective or wonky MAF sensor. May or may not have registered a fault in the ECU. I can tell you reliability is not the F30's strong suit. __________________ 2019 M4CS Lime Rock Grey, MP HAS, GC camber plates, MPE
	Appreciate 0 Quote

08-01-2014, 09:55 AM	#3
Philipangoo Lieutenant 36 Rep 465 Posts Drives: F30 335 Join Date: Oct 2012 Location: TX iTrader: (0)	Do you have an aftermarket intake ? If not yeah it's prob a problem with ur Air sensor that plugs into your intake. I would take it to the dealer __________________ 13 335i Msport 89 E30 325is 5spd
	Appreciate 0 Quote

08-01-2014, 10:19 AM	#4
BeachsideF30 Lieutenant 129 Rep 599 Posts Drives: E90--> E92-->F30 Join Date: Jun 2012 Location: FL iTrader: (0)	You really cant catch a break with this car can u lol
	Appreciate 0 Quote