erratic idle

kwike92 · 08-30-2012, 09:10 PM

my 09 has 23xxx on the clock and about a week ago when i fired it up in the am the idle flipped out bounced from 500 to 1500 to 600 to 2k then back down to 800.. last night i was driving it to the store and at a stop light, the idle went down to like 400 and almost wanted to die... then i gave it a little gas to bring it back alive.

And just now, i was driving home from work and it did it again! No check engine lights no nothing... just feels like it lacks a little power..

i made a service appt for tuesday...

any thoughts? ive heard the idle air control sensors go out on these cars?
i had another 09 that i drove from new to 81k with no problems ever...

m3an · 08-30-2012, 11:31 PM

would guess maybe the IAC is on its way out. Although when cold and just started I seem to see a little idle hunting is normal

img · 08-31-2012, 07:58 AM

ICV I'm thinking,very common issue based on the symptoms you mentioned. Good Luck !

THE TECH · 08-31-2012, 08:07 AM

Quote:

Originally Posted by m3an

would guess maybe the IAC is on its way out. Although when cold and just started I seem to see a little idle hunting is normal

Quote:

Originally Posted by img

ICV I'm thinking,very common issue based on the symptoms you mentioned. Good Luck !

+1

kwike92 · 08-31-2012, 06:36 PM

Thanks gentlemen for the responses.

08-30-2012, 09:10 PM	#1
kwike92 Major Drives: 2009 m3 coupe Join Date: Feb 2010 Location: Mission Viejo, Ca Posts: 1,150 iTrader: (4)	erratic idle my 09 has 23xxx on the clock and about a week ago when i fired it up in the am the idle flipped out bounced from 500 to 1500 to 600 to 2k then back down to 800.. last night i was driving it to the store and at a stop light, the idle went down to like 400 and almost wanted to die... then i gave it a little gas to bring it back alive. And just now, i was driving home from work and it did it again! No check engine lights no nothing... just feels like it lacks a little power.. i made a service appt for tuesday... any thoughts? ive heard the idle air control sensors go out on these cars? i had another 09 that i drove from new to 81k with no problems ever... __________________ 2009 M3 DCT Matte Grills, Matte Gills, Paint matched reflectors, RPI scoops and filter, H&R springs, 18MM spacers in front, 15MM spacers in rear.
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08-31-2012, 07:58 AM	#3
img VT3 Drives: E36 M3 Track car,Ess E90 M3 DD Join Date: Feb 2008 Location: The Couch Posts: 5,971 iTrader: (5)	ICV I'm thinking,very common issue based on the symptoms you mentioned. Good Luck ! __________________ NO FEAR.NO LIMITS.NO EQUAL Ess VT3 LC built motor,Volk TE37SL,Challenge modefied Xpipe,Akra axle back CF tips. LOW BOOST 60-130 6.7 sec

08-31-2012, 06:36 PM	#5
kwike92 Major Drives: 2009 m3 coupe Join Date: Feb 2010 Location: Mission Viejo, Ca Posts: 1,150 iTrader: (4)	Thanks gentlemen for the responses. __________________ 2009 M3 DCT Matte Grills, Matte Gills, Paint matched reflectors, RPI scoops and filter, H&R springs, 18MM spacers in front, 15MM spacers in rear.

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08-30-2012, 11:31 PM	#2
m3an Banned Drives: M3 Join Date: Oct 2010 Location: South Florida Posts: 1,612 iTrader: (2)	would guess maybe the IAC is on its way out. Although when cold and just started I seem to see a little idle hunting is normal