Engine RPM movement after fill up

RezTTU · 10-28-2013, 04:12 PM

Hi guys,

So after about 10% of my fillups, the car's engine will rev from about 500-1500 rpm on it's own for 30 seconds to a minute without me touching the throttle. Kind of odd, has it happened to anyone else? Anyone know if it's something I should be concerned with?

Thanks

jphughan · 10-28-2013, 04:44 PM

Does that for me but it happens when starting in cold weather, haven't noticed it after gassing up. If it does it often it could be an idle control valve problem (thoroughly discussed in threads here if you search), but from what you describe it sounds normal.

TOSKABG · 10-28-2013, 05:09 PM

Normal...

fuddman · 10-28-2013, 09:34 PM

A 30 second to a minute rev increase does not sound normal to me.

Mine has a slight idle increase during warmup; but, it's a brief increase, lasting, maybe, 5 seconds. This slight idle increase always occurs towards the end of the warm up cycle in the morning at first start up. Sometimes it happens when I stop then, shortly thereafter, restart the engine - like when gassing up.

fastmike · 10-28-2013, 10:51 PM

Quote:

Originally Posted by M3DreamTTU

Hi guys,

So after about 10% of my fillups, the car's engine will rev from about 500-1500 rpm on it's own for 30 seconds to a minute without me touching the throttle. Kind of odd, has it happened to anyone else? Anyone know if it's something I should be concerned with?

Thanks

Mine sputters at idle, then surges, after 50-75% of my fillups. Actually died at a light once. Only does that within the first mile. Never again for the entire tank.

2009 DCT, stock software.

Ronnydashore · 10-28-2013, 11:31 PM

add a bottle of chevron techron next time, run it through a tank (the 20 gallon one) and I assure you this will go away. Will have to repeat every 3-5 months.

e46m3to135i · 10-28-2013, 11:38 PM

Quote:

Originally Posted by Ronnydashore

add a bottle of chevron techron next time, run it through a tank (the 20 gallon one) and I assure you this will go away. Will have to repeat every 3-5 months.

I'm going through a similar issue right now. The issue came back before my next fill up.

Not the exact same issue but pretty similar:

http://www.m3post.com/forums/showthread.php?t=899436

-Nick

RezTTU · 10-29-2013, 01:23 PM

Hmm, yeah, it goes away after I start driving. I'll do some research on techron and see how it goes. At first my thought was fuel pump, since I usually fill up all the way from about a little less than 1/8 tank, but who knows.

nullrouted · 10-29-2013, 01:35 PM

My E46 M3 did this all the time, probably 90% of fill-ups. Added Techron to it, not much of a change. So far the E92 hasn't done much of this yet (maybe a small blip here and there) but I wouldn't be alarmed if it did.

10-28-2013, 04:12 PM	#1
RezTTU Private First Class 3 Rep 136 Posts Drives: Mineral White E92 ZCP Join Date: May 2011 Location: Irving, TX iTrader: (0)	Engine RPM movement after fill up Hi guys, So after about 10% of my fillups, the car's engine will rev from about 500-1500 rpm on it's own for 30 seconds to a minute without me touching the throttle. Kind of odd, has it happened to anyone else? Anyone know if it's something I should be concerned with? Thanks
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10-28-2013, 04:44 PM	#2
jphughan Brigadier General 594 Rep 4,488 Posts Drives: '16 Cayman GT4 Join Date: Mar 2011 Location: Austin, TX iTrader: (0)	Does that for me but it happens when starting in cold weather, haven't noticed it after gassing up. If it does it often it could be an idle control valve problem (thoroughly discussed in threads here if you search), but from what you describe it sounds normal. __________________ '16 Cayman GT4 (delivery pics, comparison to E92 M3 write-up) Gone but not forgotten: '11.75 M3 E92 Le Mans \| Black Nov w/ Alum \| 6MT (owned 5/2011 - 11/2015)
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10-28-2013, 05:09 PM	#3
TOSKABG vekize 0 Rep 74 Posts Drives: 2011 BMW E92/ZCP/DCT/ Join Date: May 2012 Location: Belvidere,IL iTrader: (0)	Normal...
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10-28-2013, 09:34 PM	#4
fuddman Major 354 Rep 1,405 Posts Drives: 528-maybe Join Date: Aug 2010 Location: California iTrader: (0)	A 30 second to a minute rev increase does not sound normal to me. Mine has a slight idle increase during warmup; but, it's a brief increase, lasting, maybe, 5 seconds. This slight idle increase always occurs towards the end of the warm up cycle in the morning at first start up. Sometimes it happens when I stop then, shortly thereafter, restart the engine - like when gassing up.
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10-28-2013, 11:31 PM	#6
Ronnydashore Banned 5 Rep 54 Posts Drives: 2012 Silverstone M3 DCT Join Date: Oct 2013 Location: Hollywood iTrader: (0)	add a bottle of chevron techron next time, run it through a tank (the 20 gallon one) and I assure you this will go away. Will have to repeat every 3-5 months.
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10-29-2013, 01:23 PM	#8
RezTTU Private First Class 3 Rep 136 Posts Drives: Mineral White E92 ZCP Join Date: May 2011 Location: Irving, TX iTrader: (0)	Hmm, yeah, it goes away after I start driving. I'll do some research on techron and see how it goes. At first my thought was fuel pump, since I usually fill up all the way from about a little less than 1/8 tank, but who knows.
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10-29-2013, 01:35 PM	#9
nullrouted Studying... 36 Rep 860 Posts Drives: AW '13 E92 ZCP 6MT M3 Join Date: Apr 2013 Location: North Central Florida iTrader: (0)	My E46 M3 did this all the time, probably 90% of fill-ups. Added Techron to it, not much of a change. So far the E92 hasn't done much of this yet (maybe a small blip here and there) but I wouldn't be alarmed if it did.
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