Strange idle....

NC135 · 03-15-2012, 11:04 PM

It's happened a couple of times now, I'll be sitting at a stoplight and the rpms will drop really low for 5-10 seconds and then come back up and then do it again. Maybe the start of HPFP issues? But no long start or anything...yet. Its going into the dealer on monday but what do you guys think it could be?

RnmEvo9 · 03-15-2012, 11:06 PM

Are you throwing a check engine light?

NC135 · 03-15-2012, 11:11 PM

Quote:

Originally Posted by RnmEvo9

Are you throwing a check engine light?

Nope. It just bogs down and runs rough and then does it again and then acts like it never happened.

Bavarian54bimmer · 03-16-2012, 07:23 AM

Quote:

Originally Posted by NC135

It's happened a couple of times now, I'll be sitting at a stoplight and the rpms will drop really low for 5-10 seconds and then come back up and then do it again. Maybe the start of HPFP issues? But no long start or anything...yet. Its going into the dealer on monday but what do you guys think it could be?

5 to 10 seconds drop is indeed worrying , i have some fluctuations at idle sometimes but not that long and it does not drop that low either .

are you on a tune?

gnpower · 03-16-2012, 08:09 AM

Are there any patterns? Does it only do it when it's engine is cold or hot? When the weather is hot or cold?

HondaGoneRogue · 03-16-2012, 08:40 AM

Mine has been doing that (albeit not that long). My cousin just messaged me today and said his e92 does it as well. Mine happens long enough to get your attention but not 5-10 seconds. I doubt the car could stay running at that low of an rpm for that long anyway.

HondaGoneRogue · 03-16-2012, 08:41 AM

Intrested to know how many people this is happening to.

Melinko · 03-16-2012, 09:02 AM

Mine has been doing it too recently, stalled on me twice in 2 months. I reckon its my spark plugs. Going to check the car in next week then I will see what they come back with.

icabod7 · 03-16-2012, 10:45 AM

Same issue but its only ever so briefly and usually before its gotten a chance to warm up. I'm on Cobb Stage 1 Aggressive.

NC135 · 03-16-2012, 12:00 PM

No tune. It happens, if I'm remembering correctly, when the engine is HOT just below the 250 line. And ok, maybe its not as long as Im saying (5-10) but it feels like it because time slows and all of my attention turns to it. Maybe 3-5 secs is more realistic.

John Dempsey · 03-16-2012, 01:07 PM

I get the same thing but for maybe 1-2 seconds max

Derek8819 · 03-16-2012, 01:08 PM

My 08 does that as well on the PPK, I had the plugs changed and it did not stop the idle fluctuations.

NC135 · 03-16-2012, 01:30 PM

I just went out and after driving a bit, temp was maybe 200 or so, at a stoplight it dropped to less than 500 rpms and jumped around down there and then popped back up and ran fine like nothing happened. It was on the verge of stalling.

miro2296 · 03-16-2012, 01:57 PM

Yea could be the HPFP or injectors too. Have you had any HPFP changed or injectors yet?

NC135 · 03-16-2012, 03:09 PM

Quote:

Originally Posted by miro2296

Yea could be the HPFP or injectors too. Have you had any HPFP changed or injectors yet?

I'm the second owner but since I've had it, no. I'm going to take it in and get the recall done and have them check the injectors.

miro2296 · 03-16-2012, 04:35 PM

Quote:

Originally Posted by NC135

I'm the second owner but since I've had it, no. I'm going to take it in and get the recall done and have them check the injectors.

I believe as part of the recall they update SW and injectors too. Depending on what has already been done to the car, that should take care of it!

HondaGoneRogue · 03-17-2012, 03:21 AM

I have the latest everything, software, hpfp, injectors, etc. Mine still does it.

RimasRS · 03-17-2012, 04:59 AM

Sounds like a vacuum leak...

NC135 · 03-17-2012, 12:12 PM

Quote:

Originally Posted by RimasRS

Sounds like a vacuum leak...

It wouldn't have anything to do with the vacuum hose on the exhaust would it?

Colt · 03-17-2012, 01:08 PM

Quote:

Originally Posted by HondaGoneRogue

Mine has been doing that (albeit not that long). My cousin just messaged me today and said his e92 does it as well. Mine happens long enough to get your attention but not 5-10 seconds. I doubt the car could stay running at that low of an rpm for that long anyway.

I have this for my car as well. My fuel pump has been replaced since the car was released from the factory too.

NC135 · 03-17-2012, 01:54 PM

I'm interested to see what the service department at Hendrick BMW will come up with for an explanation.

Ihave1 · 03-18-2012, 08:16 AM

This just started happening to me too, but I have never stalled. It's like the AC compressor is turning on and off except climate control is totally off. My plugs were replaced no more than 2k miles ago and I just cleaned the intake valves a couple weeks ago. I scanned for codes last week and didn't have any. I will check again today.

03-15-2012, 11:04 PM	#1
NC135 Private 7 Rep 75 Posts Drives: 2008 135i AW 6MT Join Date: Feb 2012 Location: Charlotte, NC iTrader: (0)	Strange idle.... It's happened a couple of times now, I'll be sitting at a stoplight and the rpms will drop really low for 5-10 seconds and then come back up and then do it again. Maybe the start of HPFP issues? But no long start or anything...yet. Its going into the dealer on monday but what do you guys think it could be? __________________
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03-15-2012, 11:06 PM	#2
RnmEvo9 Banned 247 Rep 1,827 Posts Drives: 2007 335i Join Date: Apr 2011 Location: Pembroke Pines, FL iTrader: (2)	Are you throwing a check engine light?
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03-16-2012, 08:09 AM	#5
gnpower Lieutenant 18 Rep 475 Posts Drives: BMW ///M Sport 135i Join Date: May 2008 Location: Red Sox Nation iTrader: (0)	Are there any patterns? Does it only do it when it's engine is cold or hot? When the weather is hot or cold? __________________ ///M 135i
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03-16-2012, 08:40 AM	#6
HondaGoneRogue They like my Swag... 433 Rep 3,762 Posts Drives: 15 GSM 435i GC Join Date: Aug 2008 Location: South Dakota iTrader: (4) Garage List 2015 435i Gran Coupe [0.00]	Mine has been doing that (albeit not that long). My cousin just messaged me today and said his e92 does it as well. Mine happens long enough to get your attention but not 5-10 seconds. I doubt the car could stay running at that low of an rpm for that long anyway. __________________ 2015 435i Gran Coupe - Current 2008 AW 135i - Sold
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03-16-2012, 08:41 AM	#7
HondaGoneRogue They like my Swag... 433 Rep 3,762 Posts Drives: 15 GSM 435i GC Join Date: Aug 2008 Location: South Dakota iTrader: (4) Garage List 2015 435i Gran Coupe [0.00]	Intrested to know how many people this is happening to. __________________ 2015 435i Gran Coupe - Current 2008 AW 135i - Sold
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03-16-2012, 09:02 AM	#8
Melinko New Member 2 Rep 11 Posts Drives: BMW M340 Join Date: Jul 2011 Location: Centurion iTrader: (0)	Mine has been doing it too recently, stalled on me twice in 2 months. I reckon its my spark plugs. Going to check the car in next week then I will see what they come back with.
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03-16-2012, 10:45 AM	#9
icabod7 Second Lieutenant 18 Rep 254 Posts Drives: 2008 135i Coupe Join Date: Jun 2011 Location: Dallas iTrader: (0)	Same issue but its only ever so briefly and usually before its gotten a chance to warm up. I'm on Cobb Stage 1 Aggressive. __________________ cdv delete \| clutch stop \| bmw performance ssk \| meisterschaft gt \| berk mids \| dinan cai \| helix fmic \| m3 subframe bushings, swaybar, front and back suspension bits \| dinan stage 1 suspension \| dinan cf strut brace \|gc camber plates \| dinan oil cooler \| apex ec-7s w/PSSs \| cobb stage 1 + fmic
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03-16-2012, 12:00 PM	#10
NC135 Private 7 Rep 75 Posts Drives: 2008 135i AW 6MT Join Date: Feb 2012 Location: Charlotte, NC iTrader: (0)	No tune. It happens, if I'm remembering correctly, when the engine is HOT just below the 250 line. And ok, maybe its not as long as Im saying (5-10) but it feels like it because time slows and all of my attention turns to it. Maybe 3-5 secs is more realistic. __________________
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03-16-2012, 01:07 PM	#11
John Dempsey Banned 31 Rep 588 Posts Drives: White 135i M-Sport Join Date: Sep 2011 Location: Encinitas iTrader: (0)	I get the same thing but for maybe 1-2 seconds max
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03-16-2012, 01:08 PM	#12
Derek8819 First Lieutenant 35 Rep 358 Posts Drives: 2015 F80 M3 Join Date: Nov 2011 Location: New Orleans, LA iTrader: (4)	My 08 does that as well on the PPK, I had the plugs changed and it did not stop the idle fluctuations.
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03-16-2012, 01:30 PM	#13
NC135 Private 7 Rep 75 Posts Drives: 2008 135i AW 6MT Join Date: Feb 2012 Location: Charlotte, NC iTrader: (0)	I just went out and after driving a bit, temp was maybe 200 or so, at a stoplight it dropped to less than 500 rpms and jumped around down there and then popped back up and ran fine like nothing happened. It was on the verge of stalling. __________________
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03-16-2012, 01:57 PM	#14
miro2296 Colonel 57 Rep 2,251 Posts Drives: '08 Montego Blue BMW 135i Join Date: Nov 2008 Location: Round Rock, TX iTrader: (1)	Yea could be the HPFP or injectors too. Have you had any HPFP changed or injectors yet? __________________ ------------------------------------- BMW 135i/6 Speed/Montego Blue/Formula One Ceramic Tint/JB4 G4/AA Sport Intercooler/19 inch Iconz 880Z(19X8.5 & 19X10)/PSS 225/35 & 265/30/E93 M3 front sway bar/TRW front and rear Control Arms/BMS Drop In Filter/Dinan Exhaust/BlackLines/Upgraded \\\M RSFB
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03-17-2012, 03:21 AM	#17
HondaGoneRogue They like my Swag... 433 Rep 3,762 Posts Drives: 15 GSM 435i GC Join Date: Aug 2008 Location: South Dakota iTrader: (4) Garage List 2015 435i Gran Coupe [0.00]	I have the latest everything, software, hpfp, injectors, etc. Mine still does it. __________________ 2015 435i Gran Coupe - Current 2008 AW 135i - Sold
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03-17-2012, 04:59 AM	#18
RimasRS Colonel 85 Rep 2,438 Posts Drives: BMW X3 SD Join Date: Sep 2010 Location: Europe iTrader: (0)	Sounds like a vacuum leak...
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03-17-2012, 01:54 PM	#21
NC135 Private 7 Rep 75 Posts Drives: 2008 135i AW 6MT Join Date: Feb 2012 Location: Charlotte, NC iTrader: (0)	I'm interested to see what the service department at Hendrick BMW will come up with for an explanation. __________________
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03-18-2012, 08:16 AM	#22
Ihave1 Private First Class 42 Rep 159 Posts Drives: 2008 135i Join Date: Jan 2011 Location: NC, USA iTrader: (1)	This just started happening to me too, but I have never stalled. It's like the AC compressor is turning on and off except climate control is totally off. My plugs were replaced no more than 2k miles ago and I just cleaned the intake valves a couple weeks ago. I scanned for codes last week and didn't have any. I will check again today.
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