Volvo S80 A performance sedan that offers top notch luxury, outstanding handling and so much more.

Cold Morning Idle

  #1  
Old 12-21-2009, 09:20 PM
Senior Member
Thread Starter
Join Date: Jul 2009
Posts: 275
Default Cold Morning Idle

My car will start quickly in the morning, but will only idle in the 900RPM range at first, then drop to its normal range of 700-750RPM. I find this strange as I would suspect 1100 to a high of 1500RPM. In any case, I shift the car into gear, hit the gas petal, and it stalls. Keep in mind I never allow the car to fully warm up.
Is there a sensor which affect the Fast Idle on this car?
 
  #2  
Old 12-21-2009, 09:36 PM
Senior Member
Join Date: Aug 2008
Location: USA, CA
Posts: 215
Default

On certain models, when the car is started, idle speed may be noticeably higher than normal for a short period, depending on the temperature of the engine.
This has been done to help bring components in the emission control system to their normal operating temperature as quickly as possible, which enables them to function normally.
 
  #3  
Old 12-23-2009, 09:24 PM
Senior Member
Thread Starter
Join Date: Jul 2009
Posts: 275
Default

Are my low RPMs the norm? What are your idle RPMs?
 
  #4  
Old 12-25-2009, 12:59 AM
Senior Member
Join Date: Aug 2008
Location: USA, CA
Posts: 215
Default

My car is usually around 1000 for cold start-ups. Duration at this RPM depends on the temp. Not long though, usually less than 15-20 sec....Then it goes down to around 500.
 
  #5  
Old 12-25-2009, 08:37 PM
Senior Member
Thread Starter
Join Date: Jul 2009
Posts: 275
Default

With the numbers you've posted, then my stalling is being caused by something. I know that I've replaced one O2 sensor (front bank) and not the other. Do you think that replacing the other O2 could resolve my issue? I hate having to throw money on parts that will not solve/improve the performance.
 
  #6  
Old 12-29-2009, 12:30 AM
Senior Member
Join Date: Aug 2008
Location: USA, CA
Posts: 215
Default

You could be on to somthing.

I heard that the O2 sensor is a very common code that is usually always tied to every error code you get on a car. Tech may be able to verify this....
 
  #7  
Old 12-29-2009, 02:18 PM
Senior Member
Thread Starter
Join Date: Jul 2009
Posts: 275
Default

The only problem is that I don't have any codes, just this stalling/hesitation issue. I'm guessing the O2 sensor is failing, but not shot, as the ECU is overcorrecting the fuel mixture.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
prophet_of_profit
Volvo 240, 740 & 940
2
07-29-2009 09:14 AM
ss~zoso~ss
Volvo 240, 740 & 940
7
01-12-2009 04:27 PM
volvolove
Volvo 260, 760 & 960
2
05-20-2007 07:07 PM
veso_ht
Volvo S80
5
04-30-2007 02:42 PM
tomskuce
Volvo V70
2
11-27-2006 08:12 PM


Thread Tools
Search this Thread
Quick Reply: Cold Morning Idle


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.