E90Post
 


ECS BMW
 
BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Abnormal Idle bouncing on N55 plus engine temp seems off (video)



Reply
 
Thread Tools Search this Thread
      10-01-2012, 11:37 PM   #1
ES_TRADER
Colonel
 
Drives: 328i, 335i, M3, 535i, X5, 36M
Join Date: Oct 2010
Location: OC

Posts: 2,532
iTrader: (3)

Garage List
2014 Ford Raptor  [0.00]
2012 328i E92  [5.00]
2013 X5  [0.00]
2013 335i F30  [4.00]
1990 Toyota Previa  [0.00]
1997 E36 M3  [5.00]
2011 E92 M3  [0.00]
2011 535i  [0.00]
Question

So this is after driving for about an hr in 100 degree heat with the A/C on. I came to a stop light and noticed the car shaking or feeling rough at idle.

I know the car was warmed up and also noticed that the engine temp was 2 notches to the left of the center notch. usually its sitting at one notch to the left but not two.

Pulled the car into the garage and didnt shut of the car. AC was on but i was turning it on and off as i taped the video. The rpms were bouncing between 600-1000. Definitely felt vibration in the seat. car is 2011 335i.

Most of the abnormal idles came when AC was on but i would get a surge in rpms to 1000 when i shut the AC OFF. weird.

Any ideas before i hit up the dealer next week?

No cel

sorry long video but u have to watch it carefully to see it..happens every 20-30 secs or so.
ES_TRADER is offline  
0
Reply With Quote
      10-02-2012, 06:38 AM   #2
Bayern1
Private
 
Drives: 2015 BMW 550i
Join Date: Jan 2011
Location: Long Island, NY

Posts: 93
iTrader: (0)

A little rpm changes at idle seems normal, but if the car is shaking, bring it in for service. Could be ignition coils, fuel pump etc.
Had my share of these issues with my 2007 335i. Now have 2012 335is and trouble free for 13ks.
Bayern1 is offline  
0
Reply With Quote
      10-03-2012, 12:06 PM   #3
ES_TRADER
Colonel
 
Drives: 328i, 335i, M3, 535i, X5, 36M
Join Date: Oct 2010
Location: OC

Posts: 2,532
iTrader: (3)

Garage List
2014 Ford Raptor  [0.00]
2012 328i E92  [5.00]
2013 X5  [0.00]
2013 335i F30  [4.00]
1990 Toyota Previa  [0.00]
1997 E36 M3  [5.00]
2011 E92 M3  [0.00]
2011 535i  [0.00]
im afraid dealer going to waste my time and tell me cannot duplicate. any other thoughts? i drove the car again yesterday but this rpm bouncing did not occur
ES_TRADER is offline  
0
Reply With Quote
      10-03-2012, 12:08 PM   #4
kkakonn
Second Lieutenant
 
kkakonn's Avatar
 
Drives: white bmw
Join Date: Jul 2012
Location: oc

Posts: 279
iTrader: (0)

Same problem with my n55 as well. A few times it rev'd up to 2k and scared the crap out of me.
__________________
kkakonn is offline  
0
Reply With Quote
      10-03-2012, 02:55 PM   #5
N55
Major
 
Drives: 2012 335IS E92
Join Date: Nov 2010
Location: Pittsburgh

Posts: 1,221
iTrader: (1)

Garage List
Before my Traded in my N55 it did the same exact thing.
__________________
2008 335xi E90 Alpine White - Sold - 8/19/10 > 2011 335xi E90 Jet Black - Sold - 6/27/12 > 2012 335IS E92 Crimson Red - Current

N55 is offline   United_States
0
Reply With Quote
      10-03-2012, 02:57 PM   #6
Juiced46
Major
 
Drives: 03 Turbo Cobra, 2011 335xi
Join Date: Jun 2010
Location: Wallingford CT

Posts: 1,032
iTrader: (3)

Completely normal. When you turn the A/C on its going to bump the idle up a tad. The slight fluctuation and the feeling you are getting is because the A/C compressor clutch is turning on and off. There is nothing wrong with your car.
Juiced46 is offline  
0
Reply With Quote
      10-03-2012, 03:57 PM   #7
Yeoman
Private
 
Drives: 2013 BMW 335is
Join Date: Aug 2012
Location: Washington, DC

Posts: 87
iTrader: (0)

Quote:
Originally Posted by Juiced46 View Post
Completely normal. When you turn the A/C on its going to bump the idle up a tad. The slight fluctuation and the feeling you are getting is because the A/C compressor clutch is turning on and off. There is nothing wrong with your car.
^^This
Yeoman is offline  
0
Reply With Quote
      10-03-2012, 04:04 PM   #8
ES_TRADER
Colonel
 
Drives: 328i, 335i, M3, 535i, X5, 36M
Join Date: Oct 2010
Location: OC

Posts: 2,532
iTrader: (3)

Garage List
2014 Ford Raptor  [0.00]
2012 328i E92  [5.00]
2013 X5  [0.00]
2013 335i F30  [4.00]
1990 Toyota Previa  [0.00]
1997 E36 M3  [5.00]
2011 E92 M3  [0.00]
2011 535i  [0.00]
Quote:
Originally Posted by Juiced46
Completely normal. When you turn the A/C on its going to bump the idle up a tad. The slight fluctuation and the feeling you are getting is because the A/C compressor clutch is turning on and off. There is nothing wrong with your car.
Is it wierd that it only did this odd fluctuation one day? And also the engine temperature gauge wasn't in the middle after driving all day long?

I know the AC on will increase idle a bit but mine was jumping up and down a lot that day. By several hundred Rpms.

Normal when AC on I see rpm bump up by 50 rpm
ES_TRADER is offline  
0
Reply With Quote
      10-03-2012, 06:33 PM   #9
Juiced46
Major
 
Drives: 03 Turbo Cobra, 2011 335xi
Join Date: Jun 2010
Location: Wallingford CT

Posts: 1,032
iTrader: (3)

Quote:
Originally Posted by ES_TRADER View Post
Is it wierd that it only did this odd fluctuation one day? And also the engine temperature gauge wasn't in the middle after driving all day long?

I know the AC on will increase idle a bit but mine was jumping up and down a lot that day. By several hundred Rpms.

Normal when AC on I see rpm bump up by 50 rpm
The engine temp doesn't always have to be in the middle. All depends on ambient conditions, obviously driving will keep it cooler and stop and go or beating on the car will make it run hotter.

Not really odd that it only happened one day. Your video shows nothing abnormal going on. Was it ever worse then this? Looks like it was really hot your dash is showing 104*, the A/C may just have been working harder that day that is all.

Does it ever happen with the A/C off?
Juiced46 is offline  
0
Reply With Quote
      10-03-2012, 06:42 PM   #10
ES_TRADER
Colonel
 
Drives: 328i, 335i, M3, 535i, X5, 36M
Join Date: Oct 2010
Location: OC

Posts: 2,532
iTrader: (3)

Garage List
2014 Ford Raptor  [0.00]
2012 328i E92  [5.00]
2013 X5  [0.00]
2013 335i F30  [4.00]
1990 Toyota Previa  [0.00]
1997 E36 M3  [5.00]
2011 E92 M3  [0.00]
2011 535i  [0.00]
Quote:
Originally Posted by Juiced46
Quote:
Originally Posted by ES_TRADER View Post
Is it wierd that it only did this odd fluctuation one day? And also the engine temperature gauge wasn't in the middle after driving all day long?

I know the AC on will increase idle a bit but mine was jumping up and down a lot that day. By several hundred Rpms.

Normal when AC on I see rpm bump up by 50 rpm
The engine temp doesn't always have to be in the middle. All depends on ambient conditions, obviously driving will keep it cooler and stop and go or beating on the car will make it run hotter.

Not really odd that it only happened one day. Your video shows nothing abnormal going on. Was it ever worse then this? Looks like it was really hot your dash is showing 104*, the A/C may just have been working harder that day that is all.

Does it ever happen with the A/C off?
It was 104 and normally when it's that hot my temp gauge will be one marker to the left of midpoint. Always that way. That day I noticed the rpm bounces I also noticed that my temp was way to the left to be normal.

I've seen it one marker to the left even on 60 degree mornings.

After driving 20 mins its always one hair to the left of center.

That day I drove for about 2 hrs straight in hot heat and the temperature was 2-3 markers to the left of center so it was signaling it was cooler on a hotter day. Odd

Also I got the rpm bounces a few times during cold starts. Bounces up and down a bit before settling down.

Normally when I turn the AC on it rpm usually doesn't move. If it does Incan barely feel it. That day it was surging and would surge when I turned the AC OFF. Not on.
ES_TRADER is offline  
0
Reply With Quote
      10-03-2012, 08:06 PM   #11
dr335is
Brigadier General
 
Drives: GTI
Join Date: Jul 2006
Location: Dallas, TX

Posts: 4,973
iTrader: (4)

Quote:
Originally Posted by Juiced46 View Post
Completely normal. When you turn the A/C on its going to bump the idle up a tad. The slight fluctuation and the feeling you are getting is because the A/C compressor clutch is turning on and off. There is nothing wrong with your car.
I disagree...
The compressor does not turn on/off every 15 sec, and at the constant rate.
These are not "small" fluctuations.
And, as the OP pointed out, the other day the phenomena was gone...

I have never seen anything like that, my AC is on 100% of time and in the summer, we've had 100+ degreed every day...
dr335is is offline  
0
Reply With Quote
      10-03-2012, 08:31 PM   #12
Juiced46
Major
 
Drives: 03 Turbo Cobra, 2011 335xi
Join Date: Jun 2010
Location: Wallingford CT

Posts: 1,032
iTrader: (3)

Quote:
Originally Posted by dr335is View Post
I disagree...
The compressor does not turn on/off every 15 sec, and at the constant rate.
These are not "small" fluctuations.
And, as the OP pointed out, the other day the phenomena was gone...

I have never seen anything like that, my AC is on 100% of time and in the summer, we've had 100+ degreed every day...
You are correct it doesnt cycle every 15 secs. However the OP stated he was manually turning it on and off which will cause it to kick on.
Juiced46 is offline  
0
Reply With Quote
      10-03-2012, 09:01 PM   #13
ry335
Private First Class
 
Drives: 2011 E90 335i
Join Date: Sep 2012
Location: South Florida

Posts: 101
iTrader: (1)

I have the exact same problem on mine. This happens all of the time, and I live in a very hot climate. The AC has nothing to do with it. That was my first though, so I tried driving around for a while with it off and it did not make a difference.

I saw a thread in the N55 section and somebody reported there is a pending software update to solve the issue.
__________________
Ryan
2011 AW E90 335i M-Sport | PPK | Alpina Flash
ry335 is offline  
0
Reply With Quote
      10-03-2012, 09:31 PM   #14
ES_TRADER
Colonel
 
Drives: 328i, 335i, M3, 535i, X5, 36M
Join Date: Oct 2010
Location: OC

Posts: 2,532
iTrader: (3)

Garage List
2014 Ford Raptor  [0.00]
2012 328i E92  [5.00]
2013 X5  [0.00]
2013 335i F30  [4.00]
1990 Toyota Previa  [0.00]
1997 E36 M3  [5.00]
2011 E92 M3  [0.00]
2011 535i  [0.00]
Quote:
Originally Posted by ry335
I have the exact same problem on mine. This happens all of the time, and I live in a very hot climate. The AC has nothing to do with it. That was my first though, so I tried driving around for a while with it off and it did not make a difference.

I saw a thread in the N55 section and somebody reported there is a pending software update to solve the issue.
Do you think it has something to do with the thermostat?

So odd that I got this issue when the needle was dead center after the car was fully warmed up.

All my other cars are just fine. This one is the only one that acts funny
ES_TRADER is offline  
0
Reply With Quote
      10-03-2012, 09:33 PM   #15
ES_TRADER
Colonel
 
Drives: 328i, 335i, M3, 535i, X5, 36M
Join Date: Oct 2010
Location: OC

Posts: 2,532
iTrader: (3)

Garage List
2014 Ford Raptor  [0.00]
2012 328i E92  [5.00]
2013 X5  [0.00]
2013 335i F30  [4.00]
1990 Toyota Previa  [0.00]
1997 E36 M3  [5.00]
2011 E92 M3  [0.00]
2011 535i  [0.00]
I got the rpm surge up to 900 when I shut the AC OFF. The rpm increase should come when AC is turned ON. But not by a few hundred rpm. The dealer told me its supposed to be 50rpm increase, at least on my 328 at the time a while back
ES_TRADER is offline  
0
Reply With Quote
      10-03-2012, 10:06 PM   #16
chrisk03
Private First Class
 
chrisk03's Avatar
 
Drives: 2011 335i M-Sport
Join Date: Dec 2011
Location: Northeast

Posts: 133
iTrader: (2)

Get the same thing sometimes on my N55. Noticed mostly with the AC on when it happens and not sure if ever happened without it on. I believe one time I shut the AC off and it stopped "bouncing". It actually just happened today, but once I start moving, it seems to be fine and the RPMs settle into "normal".

I just had my car in for service and forgot to mention, as it honestly is pretty rare and really didn't bother me, so would love to know if there actually is a SIB out there for this issue and a software update.
__________________
2011 335i M-Sport, BMW Performance Powerkit Version 1, BMW Performance Exhaust (SOLD), 35% F1 Pinnacle Tint
chrisk03 is offline   United_States
0
Reply With Quote
      10-04-2012, 10:45 AM   #17
dr335is
Brigadier General
 
Drives: GTI
Join Date: Jul 2006
Location: Dallas, TX

Posts: 4,973
iTrader: (4)

Quote:
Originally Posted by ES_TRADER View Post
So this is after driving for about an hr in 100 degree heat with the A/C on. I came to a stop light and noticed the car shaking or feeling rough at idle.

I know the car was warmed up and also noticed that the engine temp was 2 notches to the left of the center notch. usually its sitting at one notch to the left but not two.

Pulled the car into the garage and didnt shut of the car. AC was on but i was turning it on and off as i taped the video. The rpms were bouncing between 600-1000. Definitely felt vibration in the seat. car is 2011 335i.

Most of the abnormal idles came when AC was on but i would get a surge in rpms to 1000 when i shut the AC OFF. weird.

Any ideas before i hit up the dealer next week?

No cel

sorry long video but u have to watch it carefully to see it..happens every 20-30 secs or so.
So, was this occuring as you were turning the AC on and off (every 20 sec) or, you're implying that you had the AC on or off and the same thing was happening?
dr335is is offline  
0
Reply With Quote
      10-04-2012, 12:05 PM   #18
Thp4
Private
 
Thp4's Avatar
 
Drives: 2011 335i msport
Join Date: Aug 2011
Location: Florida

Posts: 62
iTrader: (0)

My N55 does this sometimes too. On one occasion a couple of weeks ago, it stuttered like it was going to cut off and then the RPMs shot up to 1000 before settling back down. I scanned codes and 31E9 showed up. I cleared it and reset adaptations and issue has not reoccurred.
Thp4 is offline   United_States
0
Reply With Quote
      10-04-2012, 12:13 PM   #19
ES_TRADER
Colonel
 
Drives: 328i, 335i, M3, 535i, X5, 36M
Join Date: Oct 2010
Location: OC

Posts: 2,532
iTrader: (3)

Garage List
2014 Ford Raptor  [0.00]
2012 328i E92  [5.00]
2013 X5  [0.00]
2013 335i F30  [4.00]
1990 Toyota Previa  [0.00]
1997 E36 M3  [5.00]
2011 E92 M3  [0.00]
2011 535i  [0.00]
Quote:
Originally Posted by dr335is
Quote:
Originally Posted by ES_TRADER View Post
So this is after driving for about an hr in 100 degree heat with the A/C on. I came to a stop light and noticed the car shaking or feeling rough at idle.

I know the car was warmed up and also noticed that the engine temp was 2 notches to the left of the center notch. usually its sitting at one notch to the left but not two.

Pulled the car into the garage and didnt shut of the car. AC was on but i was turning it on and off as i taped the video. The rpms were bouncing between 600-1000. Definitely felt vibration in the seat. car is 2011 335i.

Most of the abnormal idles came when AC was on but i would get a surge in rpms to 1000 when i shut the AC OFF. weird.

Any ideas before i hit up the dealer next week?

No cel

sorry long video but u have to watch it carefully to see it..happens every 20-30 secs or so.
So, was this occuring as you were turning the AC on and off (every 20 sec) or, you're implying that you had the AC on or off and the same thing was happening?
I was turning the AC on and off every 30 sec or so in the video. The bouncing came when the AC was on but the surge to 1000 came when AC was pushed off. Then returned to normal.

But prior to me actuating the AC button, I would feel The car shuttering at the stop light while AC was ON. And I saw the bouncing of Rpms.

It was when I got in my garage that I decided to test the button on and off while shooting video
ES_TRADER is offline  
0
Reply With Quote
      10-04-2012, 12:22 PM   #20
Bleep
First Lieutenant
 
Bleep's Avatar
 
Drives: 335xi
Join Date: Jan 2011
Location: Brooklyn NY

Posts: 370
iTrader: (0)

If it only happens when you turn the AC on or off that's totally normal since you're putting more load on the engine and it takes the car a moment to acclimate itself. As to why you only recently realized this you probably simply didn't pay enough attention. It happens to just about every car when you turn on/off the AC.
Bleep is offline  
0
Reply With Quote
      10-04-2012, 12:32 PM   #21
ES_TRADER
Colonel
 
Drives: 328i, 335i, M3, 535i, X5, 36M
Join Date: Oct 2010
Location: OC

Posts: 2,532
iTrader: (3)

Garage List
2014 Ford Raptor  [0.00]
2012 328i E92  [5.00]
2013 X5  [0.00]
2013 335i F30  [4.00]
1990 Toyota Previa  [0.00]
1997 E36 M3  [5.00]
2011 E92 M3  [0.00]
2011 535i  [0.00]
Quote:
Originally Posted by Bleep
If it only happens when you turn the AC on or off that's totally normal since you're putting more load on the engine and it takes the car a moment to acclimate itself. As to why you only recently realized this you probably simply didn't pay enough attention. It happens to just about every car when you turn on/off the AC.
I understand that this happens when I turn on the AC but in my case it started jumping around. None of my other n55s do this.

In the video u can see its abrupt here and there. Also today I went for a drive and turned the AC on. There was no change in rpm whatsoever. Did it many times and no change in rpm.

That day I shot the video rpm bounced and I felt the car shake
ES_TRADER is offline  
0
Reply With Quote
      10-04-2012, 01:04 PM   #22
benzo23
Colonel
 
benzo23's Avatar
 
Drives: 14 F30 AW MSport
Join Date: Apr 2010
Location: FL

Posts: 2,886
iTrader: (1)

Sometimes when im low on gas too i get a little rpm shake...
benzo23 is offline  
0
Reply With Quote
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 08:03 PM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST