C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

RPM needle bouncing up and down

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 08-12-2013, 03:16 PM
  #1  
Newbie
Thread Starter
 
allBlack's Avatar
 
Join Date: Jul 2013
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
C300 Sport
RPM needle bouncing up and down

2010 C300 Sport.

The RPM needle is going up and down while in drive or park ever so slightly. About .25k RPM or so (probably lower). It happens with A/C off or on. It's hard to see if unless you look for it but sometimes it moves up and down a lot.

Is this normal?
Old 08-12-2013, 03:38 PM
  #2  
Doa
MBWorld Fanatic!
 
Doa's Avatar
 
Join Date: Apr 2013
Location: Belgium
Posts: 1,130
Received 98 Likes on 78 Posts
W205
no its not. had it with my previous car and it was the EGR vavle sensor
Old 08-12-2013, 04:25 PM
  #3  
Newbie
Thread Starter
 
allBlack's Avatar
 
Join Date: Jul 2013
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
C300 Sport
Originally Posted by Doa
no its not. had it with my previous car and it was the EGR vavle sensor
How did you find out it was the EGR valve sensor? Would the car give out a reading saying it was bad?

I haven't had any error messages or anything other than a TPMS once.
Old 08-12-2013, 11:32 PM
  #4  
Doa
MBWorld Fanatic!
 
Doa's Avatar
 
Join Date: Apr 2013
Location: Belgium
Posts: 1,130
Received 98 Likes on 78 Posts
W205
i took the car to the dealer
Old 08-13-2013, 01:37 PM
  #5  
Newbie
Thread Starter
 
allBlack's Avatar
 
Join Date: Jul 2013
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
C300 Sport
Originally Posted by Doa
i took the car to the dealer
Did you have an error message that indicated what the problem was or did they just end up looking around the whole vehicle for a problem?

I don't have any error codes at the moment.
Old 08-13-2013, 01:59 PM
  #6  
Doa
MBWorld Fanatic!
 
Doa's Avatar
 
Join Date: Apr 2013
Location: Belgium
Posts: 1,130
Received 98 Likes on 78 Posts
W205
nope had no fault message. was on a BMW 3 series
Old 08-14-2013, 08:55 PM
  #7  
Newbie
Thread Starter
 
allBlack's Avatar
 
Join Date: Jul 2013
Posts: 6
Likes: 0
Received 0 Likes on 0 Posts
C300 Sport
I took it in and they told me that it is normal due to the a/c compressor pulling in air. But problem is it happens even with A/C off.

Anybody have any insight?
Old 01-05-2015, 05:35 PM
  #8  
Junior Member
 
hhh818's Avatar
 
Join Date: Nov 2011
Posts: 34
Likes: 0
Received 0 Likes on 0 Posts
C350
Originally Posted by allBlack
I took it in and they told me that it is normal due to the a/c compressor pulling in air. But problem is it happens even with A/C off.

Anybody have any insight?

what happened to your rpm needle? did you get it fixed? same thing happening to mine.
Old 01-11-2018, 11:50 AM
  #9  
Newbie
 
Karl-Benz's Avatar
 
Join Date: Dec 2017
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
2012 C250
Originally Posted by hhh818
what happened to your rpm needle? did you get it fixed? same thing happening to mine.
Does anyone have an answer for this? If it's normal? My 2012 c250 rpm bounces ever so slightly on a cold start. It stops after it's kinda warmed up. But if I tried, I could feel the car shudder a bit with the needle. Should I bring this in? I have extended warranty.

I've experience extremely rough idle with my jag in the past but because it was never tuned up on time.
Old 01-11-2018, 01:19 PM
  #10  
MBWorld Fanatic!
 
michail71's Avatar
 
Join Date: Nov 2015
Posts: 1,282
Received 55 Likes on 51 Posts
2013 C250 Sport
I'm not sure on this car but it can often be the first sign of a vacuum leak on may cars.
Old 01-11-2018, 06:36 PM
  #11  
Junior Member
 
c300biceps's Avatar
 
Join Date: Dec 2016
Location: toronto
Posts: 21
Received 1 Like on 1 Post
2010 c300 4 matic sport
might be early signs of bad MAF sensor. my guess. it was the case with my buddy's c350.

good luck

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: RPM needle bouncing up and down



All times are GMT -4. The time now is 11:52 AM.