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Last post on Feb 03, 2013 at 9:08 AM
You are in the Cadillac DTS
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Cadillac DTS, Automotive News, Sedan
#322 of 894 Re: 06 DTS Cruise Control When Going Downhill [dotbowels]
Sep 13, 2006 (8:57 pm)
I own a 2004 Deville and it does the same thing as you describe. I also own a Lincoln Town Car and both the cruise and the transmission are much more effective on down grades.
There is a button on the gear shifter that takes the Town Car out of overdrive and into third which makes the first shift very easy, can also use the shifter to put the car in second. I have been told by several people that the Lincoln transmissions and cruise controls are more effective than Cadillac. My direct experience as an owner of both cars bears that out. I owned a 98 Deville before the 2004 and the same performance you describe applies. The Cadillac has
some advantages over the Lincoln such as smoother power delivery and of course Onstar to name a few. The one feature of the Lincoln I like most over the Cadillac is a much more quiet ride. Both great cars, I understand Lincoln will phase out towncar after the 2007 model which I think is a mistake if they do.
#323 of 894 Re: 06 DTS Cruise Control When Going Downhill [bremertong]
Sep 14, 2006 (8:14 am)
If understand your post correctly, you are downshifting your towncar into a lower gear for greater engine braking on hills. The towncar's cruise control is not doing this.
I am skeptical that your 98 Deville was any different than the 2004. Both cars have the same axle ratios and transmissions, so engine braking on hills should be very similar. However, the 2000 model year northstar was a new engine, and there may be some differences to the transmission too. However, GM's cruise controls have never downshifted to maintain cruising speeds. As I pointed out, on a steep hill downshifting into 3rd gear will improve engine braking. Below 40 MPH 2nd gear may be needed...
#324 of 894 Re: Tapping Sound in Exhaust? System [fmoeller]
Sep 14, 2006 (3:18 pm)
Bulletin is Document ID# 1856743. (Very short) Concern: "Some customers may comment of a pulsing noise from the engine that occurs during the first minute when starting the engine after sitting several hours. The noise may be mistaken for an exhaust leak. It is actually a normal combustion noise caused by an aggressive fuel and spark to heat the catalytic converters in order to meet more stringent 2006 model year emission requirements."
Recommendations:" This is normal engine noise and no repairs should be made in an attempt to improve it" END
In my case its more like two minutes after cold start, its not from the engine but sounds like a metal to metal series of taps in the lower rear driver side of the car. Will let you know if we run this to ground.
#325 of 894 foot off gas and rpms don't drop. car keeps going
Sep 17, 2006 (12:59 pm)
This 2006 DTS lux III car has been driving me crazy. I couldn't figure out why the car wouldn't stop when I took my foot off the gas pedal until i looked at the tach. the rpms drop only 50 or so rpms. drive 65 on a xway take foot off the gas and the car goes another 3/4 mile without slowing below 60. rpms drop maybe 200. The rpms won't drop until you touch the brake. What is worse is trying to drive in traffic at 45. Car in front takes goes off gas and slows, DTS keeps accelerating into back of car.You are forced to brake and then you fall way behind and have to step on accel to keep up unfortunately you have to brake again to keep from hitting car in front again no matter how lightly you touch the gas. And so it continues brake gas,brake gas unendingly. the brakes aren't going to last long at this rate. Driving the car in over all conditions I doubt if I have my foot on the gas more than 8% of the time. You feel like you ar out of total control of this car. I have had the car to the dealer twice and no solution. enterprise 2006 rental does same thing. I got a rental 2007 DTS and they fixed it. However they are unable to fix my 2006. I have opened a case with customer service and I am taking it in for the third time next tuesday.
#326 of 894 Re: foot off gas and rpms don't drop. car keeps going [buckeyedad]
Sep 17, 2006 (9:48 pm)
Strongly suggest you find another dealer. I had a problem with A Deville I own and after three trips the first dealer recommended over two thousand dollars of warranty repair work for an oil leak. I also had a case open with Cadillac and on discussion we decided to try the next closest dealership and it turned out that the first dealership had replaced the oil filter adapter gasket but never wiped the oil residue off the bottom of the car and later said I needed a complete engine reseal. The second dealership wiped the oil from the bottom and has not leaked in the six months since clean up was done. This is the real world of car dealership service departments. I have never owned a Japanese car but if I have a few more experiences like that I will have to consider one, not to say that the service departments at the Japanese makers are any better. Bottom line, get back with your case worker at Cadillac and schedule a visit to the next nearest Cadillac dealership, it worked for me and MAY work for you. In any event please let us know the outcome and best wishes.
#327 of 894 Re: foot off gas and rpms don't drop. car keeps going [bremertong]
Sep 18, 2006 (5:40 am)
I don't really think this is a problem with the dealer. It seems to be a design problem of the car. Most people obviously don't care enough that the car drives like that. the dealer said it is a problem other people have had. but most people accept " they are all like that". the dealer actually replaced the throtle chip and reprogrammed with 2006 program. they are not allowed to reprogram with 2007 code for liability reasons. the 2006 other parts hasn't been tested with the 2007 program and their might be interoperability problems with other systems. I think lemon laws is my only solution if I can get it thru.
#328 of 894 Re: foot off gas and rpms don't drop. car keeps going [buckeyedad]
Sep 19, 2006 (4:52 pm)
Since reading your post about the rpm's I've been watching the tachometer on my '06 DTS which I've owned since July of this year. My car definitely does drop the rpm's when I take my foot off the accelerator....they drop to about 800 when coasting or when I lift my foot from the gas pedal.
There is definitely something wrong with the programming of your vehicle (PCM, maybe?). I wouldn't deal with the service department much longer....I'd be on the phone with a Cadillac advisor pronto.
#329 of 894 RE: foot off gas and rpms don't drop
Sep 20, 2006 (7:53 am)
You should all be aware that if you are cruising along at a speed where the torque converter has been locked up - usually over 40 MPH - then taking your foot off the gas (I assume the cruise control is off) will not result in the tachometer showing much change in the engines RPM's. Since the engine is in direct link to the wheels with the torque converter locked up (or out), the engine will not slow down. Tapping the brakes will unlock the torque converter, which will allow the engine to slow down.
On level ground taking your foot off the gas should result in the car slowing down. However, if you are going downhill, you may well continue to accelerate or certainly not slow down much.
There is some possibility that the computer is adding some fuel to keep the engine running faster to compensate for the A/C compressor running, but perhaps the compressor is actually off. This would result in the car seeming speeding along with a mind of its own. Perhaps hitting the brakes kills this mode of operation. I would think that reprogramming the computer might fix the problem if there is a problem with the software, but if the original software is the problem, restoring it will do no good unless there has been an upgrade.
If your dealer has given up, then you should take the problem up with Cadillac. I think that your owners manual has information on how to do that.
Sep 20, 2006 (8:22 pm)
Recieved the new 2007 DTS booklet today. Noticed that LUXURY I is now an option package along with LUXURY II. Also the Bose sound system is standard on base models. About time. Rented an Avalon a couple of weeks ago on an extended trip in Florida. Lots of wind and road noise -far more than on my '03 Deville. CU downplays this. I also rented a Dodge Stratus last weekend. Very nice car -good ride and fairly quiet and peppy. CU blasts the ride and power. I'll quit reading their reviews. It doesn't sound like we even drove the same model car.
#331 of 894 Re: Bose Radio [dispencer1]
Sep 21, 2006 (8:06 am)
For the 2006 model year there were 4 basic trim levels for the DTS, lux I, lux II, lux III and Performance. For 2007 there are still 4 trim levels: basic, lux I, lux II and Performance. As I read the standard vs optional equipment lists, the bose speakers are optional on the lower two trim levels and standard on the upper two...
I have never considered CU to be competent at testing cars or pocket calculators for that matter.