Jump to content
CaddyInfo Cadillac Forum

Recommended Posts

Hi all.  I have a 2009 Cadillac CTS and this past weekend, I began noticing that my RPMs would jump every time I went up a hill. Not a huge spike, maybe 2000/2100 to 2300/2400. This was on the highway, but now it doesn't matter whether I'm on cruise control or have my foot on the accelerator, I am noticing a "jerking", "stuttering", "burst of energy" every time I accelerate.  

The local mechanic had my car for four days this past week and couldn't find anything wrong with it.  Since the check engine light isn't on, there are no codes for them to diagnose it. 

I did get a new oil change and put a can of Sea Foam in my gas tank thinking that maybe I had bad gas, but the car is still acting up.  

Does anyone have any ideas?  Has anyone ever had a problem with acceleration AND no check engine light?

I appreciate your help in advance!

Link to comment
Share on other sites

  • 4 weeks later...

Hi did you ever figure this out?

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

Link to comment
Share on other sites

Sounds to me maybe a torque converter clutch failing (coming in and out of lockup); but just a guess.

Chuck

'19 CT6, '04 Bravada........but still lusting for that '69 Z-28

Link to comment
Share on other sites

I was thinking it was TCC related also.  Initially i thought it was normal behavior, as he said it happened going up a hill.  

I am wondering if this is more than one issue @Geese

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

Link to comment
Share on other sites

@BodybyFisher

It took the Cadillac technician two days to figure it out.  The first day, they couldn't recreate the problem. There were no codes since there was never any check engine lights on.   After a few hours outside, they started the car from a cold start and they were able to replicate it once.  His best guess was that it was the throttle body had some kind of build up on it.  That was removed and cleaned and put back in.  When it was put back it, this recreated the issue which is what led them to keep the car overnight.  

Long story short, the Cadillac tech did a reset of the computer and that appears to have solved the issue.  

Link to comment
Share on other sites

@Geese. Oh good, I am happy this was resolved.  Thanks for looping back.

Let us know how we can help going forward.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...