Jump to content
CaddyInfo Cadillac Forum

Speed Limiters

Texas Jim

Recommended Posts

This is probably a stupid question.

I have a '06 DTS Performance Edition with "H" rated tires. What speed is it limited to?

I have ran it up to almost 130 a couple of times, but ran out of room to see where it kicked in at.

It does that SO EASY........ :D

Posted Image
Link to comment
Share on other sites

I have Z rated tires on my 1997 Eldorado Touring Coupe and I don't feel any strong urge to have the governor taken off. If I ever take that car to Germany or some other improbable circumstande, I will have it done.

From posts here, they way that the dealer does that is to reprogram the PCM using the VIN of another car that comes with Z rated tires. I'm not sure that I like that. I thought that they just reset a flag or some such.

I've had mine up to 125 and it was right in the power band for 4th gear and felt really strong. It wanted to go. I do point out that the FSM says that the governor works by shutting down the fuel injectors. I'm not sure I want that invoked on my engine, although I'm sure that they know exactly what they are doing.

-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

Link to comment
Share on other sites


My '94 Deville Concours runs OK in the mid to high 120's for any number of miles, so I would guess its limited to 130. However, I fond it disconcerting to run that hard though for 20-30 rail-straight miles at a stretch - alongside ranch fencing, trees, poles, etc on narrow 2-lane roads. The term "tunnel vision" becomes quite relevant. You tend to worry too much about being focusing tightly - yet become bored, distracted after while and drift out of a tight line. Kinda like hynotizing that ole chicken with a line on the floor... :blink:

Regarding the fuel limiter. My 99 GMC would get hit hard at around 97 and loose several mph only to creep back up. When we had a hard run of about 2-hours flat out, it took a bit to stay just under the limiter (I forgot to try the cruise control at 96...). By comparison, my 2006 Chevy company pickup with a couple hundred miles on it - is undetectable engaging its limiter at 97.


Add power to leave problems behind. Most braking is just - poor planning.
Link to comment
Share on other sites


This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

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