Engine idling rough - Smart Car Forums
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 04-11-2019, 05:43 PM Thread Starter
 
Join Date: Jul 2017
Posts: 4
Thanks: 1
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Engine idling rough

Anyone's 453 run a bit rough at idle? I bought the car brand new and it wasn't this rough for the first 5k miles. I have tried different gas, etc asll the same. I took it to Mercedes of Sacramento and they said 2 things. 1 they have never even had a newer smart in there and 2 it was normal. If I rev it to like 1200 RPM's it is fine and smooth but just sitting at a light its definitely rumbling.
Team_Smartcar is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 04-11-2019, 05:56 PM
 
Join Date: Feb 2009
Location: Lehighton, PA
Posts: 1,134
Thanks: 2
Thanked 51 Times in 48 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 289 Post(s)
Quote:
Originally Posted by Team_Smartcar View Post
Anyone's 453 run a bit rough at idle? I bought the car brand new and it wasn't this rough for the first 5k miles. I have tried different gas, etc asll the same. I took it to Mercedes of Sacramento and they said 2 things. 1 they have never even had a newer smart in there and 2 it was normal. If I rev it to like 1200 RPM's it is fine and smooth but just sitting at a light its definitely rumbling.
Well, also have to keep in mind that it's only a 3-cylinder. Smarts do tend to idle on the odd side in my experience. I guess you could say less like butter, more like oatmeal with a touch too much milk. Just a bit lumpy.

On another note, getting your 453 straight-piped only makes it more obvious. Lol

Sent from my Pixel 3 XL using Tapatalk
ElementalDragon is offline  
post #3 of 4 (permalink) Old 05-16-2019, 06:47 AM
 
Join Date: May 2019
Location: UK
Posts: 3
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
I had the same concern with a new 453 (smart fortwo), and like yourself, my local dealer also assured me that it was normal for 3-cylinder engine in smarts. There's loads of articles on Internet explaining the reasons for vibration/imbalance on straight-three engines, and a bit of roughness/vibration at idle definitely seems to be normal. Hopefully you'll get used to it
smart_gary is offline  
Sponsored Links
Advertisement
 
post #4 of 4 (permalink) Old 05-16-2019, 08:13 AM
 
1stiski's Avatar
 
Join Date: Mar 2017
Posts: 527
Thanks: 0
Thanked 48 Times in 43 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 102 Post(s)
Our 453 idles smoothly . I have the Lorinser powerpack . I’m guessing that may have something to do with it . When I first installed the powerpack I had an electrical interference issue with the car running smoothly at idle. I had to re route some of the powerpack wires to the top of the stock harness to avoid the problem .. since I did that , the idle has been super smooth .
1stiski is online now  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Smart Car Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Vibration while idling hms6744 smart Operation and Maintenance 12 02-23-2017 01:11 PM
Engine starts rough, sometimes stalls?! racerrobcc4 smart Operation and Maintenance 3 02-10-2017 05:38 AM
Car dies when slowing or idling RDMaysJr smart Operation and Maintenance 7 12-26-2013 08:27 AM
Check Engine Light - rough idle, sputters when driving smartdustin smart Operation and Maintenance 3 11-20-2012 01:58 AM
Rough idle blackbeagle smart Operation and Maintenance 9 04-18-2008 03:05 PM

Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome
 

Clubs, Garage Plus vBulletin Plugins by Drive Thru Online, Inc.