02 SLS not liking the cold weather

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 4 of 4
Northstar Engines and System Technical Discussion Discussion, 02 SLS not liking the cold weather in Cadillac Engine Technical Discussion; OK so lately my 02 SLS has been acting weird when it's really cold out. Like today it was 29 ...
  1. #1
    90devilleguy's Avatar
    90devilleguy is offline Cadillac Owners Enthusiast
    Automobile(s): 2002 SLS & 1962 Coupe Deville
    Join Date
    Nov 2003

    02 SLS not liking the cold weather

    OK so lately my 02 SLS has been acting weird when it's really cold out. Like today it was 29 F and when i start my car it starts up fine but i notice that the AIR pump does not come on at all and the car will actually sit and idle around 1000 rpms always, instead of 1200-1300 like it normally would and then idle down to like 750-800 rpms.

    Is that normal?

    Also when it's cold like this the transmission shifts into reverse or drive really hard. Like slamming into gear sometimes....only on the first start up.

    any advice????

  2. Remove Advertisements

  3. #2
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 F150 SuperCab 4x4
    Join Date
    Feb 2006
    MD Eastern Shore - Kent Island

    Re: 02 SLS not liking the cold weather

    A.I.R. supplies extra oxygen in the exhaust which is used to light off the cat quickly under different conditions, so maybe the before and after cat O2 sensors are saying "well, we don't need extra oxygen right now". Probably nothing to worry about. (If the fuel/air ratios going to/from the engine are very close to perfect for the current operating conditions, A.I.R. is not needed). The 1,000 rpm fast idle for the first 30 -40 seconds is probably OK also. As long as it drops down to the 700 - 800 then later down to 650. Where are you engaging D the first time? At 1,000 rpm? If so, with cold fluid you'll get an aggressive first/R engagement. Wait 'till it drops to the 700 - 800 point.

  4. #3
    ryannel2003's Avatar
    ryannel2003 is offline Cadillac Owners Connoisseur
    Automobile(s): 2001 Honda Accord EX V6. Previous: 2004 Deville, 2000 STS
    Join Date
    Apr 2007
    New Bern, NC

    Re: 02 SLS not liking the cold weather

    My car has the same rough engagement on cold mornings. I asked my boss at the Cadillac dealership and he said it's perfectly normal and there isn't anything to worry about.

  5. #4
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Woodstock Ill.

    Re: 02 SLS not liking the cold weather

    I think what you are seeing is normal. I've recently noticed below 30 deg. starts that my idle is at about 1000 rather than the usual 1300 as well.

    As for the hard shift into reverse, I experienced that the other day for the first time. Just kind of shrugged it off.

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

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

Please enter a valid email address for yourself.


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting