Strange cold start on F80 M3?

Washer48 · 05-29-2019, 08:24 PM

Hi guys,

My F80 M3 has been having a bit of a strange cold start. The car will start normally, drop to under 500 rpms and sound like it's about to stall, and then shoot up to above 2k and settle back down. The car runs totally fine afterwards, and only really occurs on cold starts. The car has about 56k miles.

Any thoughts?

///M/// · 05-29-2019, 08:46 PM

Manual or DCT? Tune?

Washer48 · 05-29-2019, 08:50 PM

Quote:

Originally Posted by ///M///

Manual or DCT? Tune?

Whoops. That might be important. DCT, no tune as of now.

Zero_Cool · 05-29-2019, 11:13 PM

Do you have aftermarket intakes?

4everkidd · 05-30-2019, 02:02 AM

Quote:

Originally Posted by Zero_Cool

Do you have aftermarket intakes?

This...

Washer48 · 05-30-2019, 07:46 PM

Quote:

Originally Posted by Zero_Cool

Do you have aftermarket intakes?

Stock intakes.

FSociety · 05-31-2019, 06:15 AM

Can be bad gas, time for spark plugs replacement, injectors, or coils in that order.
Have you ran a diagnostic ?

SoupPlug · 06-02-2019, 02:51 PM

Could be MAF sensor

Beemerm3 · 11-17-2019, 02:02 AM

my car seem to be doing this.

05-29-2019, 08:24 PM	#1
Washer48 New Member 0 Rep 10 Posts Drives: '15 F80 M3 Join Date: May 2019 Location: Midwest iTrader: (0)	Strange cold start on F80 M3? Hi guys, My F80 M3 has been having a bit of a strange cold start. The car will start normally, drop to under 500 rpms and sound like it's about to stall, and then shoot up to above 2k and settle back down. The car runs totally fine afterwards, and only really occurs on cold starts. The car has about 56k miles. Any thoughts?
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05-29-2019, 08:46 PM	#2
///M/// Brigadier General 1862 Rep 3,661 Posts Drives: 2016 Manual AW F80 Join Date: Jul 2009 Location: Philly iTrader: (6)	Manual or DCT? Tune? __________________ ========================= 2016 F80 M3 AW/SO (Manual) - Picked up at the Welt 08/28/15 My Amazing European Delivery Story
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05-29-2019, 11:13 PM	#4
Zero_Cool Lieutenant 191 Rep 527 Posts Drives: 18 M3 Imola 6spd Join Date: Feb 2015 Location: Nashvegas iTrader: (1)	Do you have aftermarket intakes?
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05-31-2019, 06:15 AM	#7
FSociety IG @bmwF9xG80 3813 Rep 7,593 Posts Drives: G80 M3, X4M, G07 X7m50 Join Date: Apr 2012 Location: NYC to NJ to Orlando FL iTrader: (3) Garage List 2023 BMW G80 M3 [0.00] 2020 BMW X4MC [0.00] 16' BMW X4 M40i [10.00] 06 Cadillac STS [0.00]	Can be bad gas, time for spark plugs replacement, injectors, or coils in that order. Have you ran a diagnostic ? __________________ 60-130mph 6.5s X4M #HCP 60-130mph 5.0s G80 M3 #OrlandoAutowerks Sauce IG: @bmwF9XG80
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06-02-2019, 02:51 PM	#8
SoupPlug Private 17 Rep 55 Posts Drives: 2018 BSM ZCP M3 Join Date: May 2018 Location: New York, NY iTrader: (0)	Could be MAF sensor
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11-17-2019, 02:02 AM	#9
Beemerm3 First Lieutenant 59 Rep 345 Posts Drives: 16' BMW m3 Join Date: Jul 2019 Location: Sacramento iTrader: (0)	my car seem to be doing this.
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