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That's because it really is a "surge".
Well, sorta'.
Historically, circa ~2001, it has been referred to as being "bumped slightly from behind" (10-0MPH), or a "slingshot effect" (40-30MPH).
According to the Toyota or Lexus shop/repair manuals as you coast down with closed throttle, braking or not, say 10-0 MPH, or 40-30, your transaxle is PROGRAMMED to upshift into a higher gear ratio.
There are several possibilities for this shift pattern/schedule change in the engine/transaxle ECU control firmware.
A) An upshift to lower the effects of engine compression braking will undoubtedly extend your coasting distance if that should happen to be your intent and therefore an improvement in FE.
On a slippery roadbed a significant level of engine compression braking on the front wheels could result in loss of directional control and thereby oftentime a serious accident. Ford was just granted a US patent for a technique involving a significant reduction in regenerative braking should the OAT be hovering around or below freezing in the FWD Escape and Mariner hybrids.
C) The positive displacement gear type ATF oil pump within the transaxle can be a HUGE consumer of energy, needlessly, hour upon hour, simply cruising down the hwy. So the sizing of this oil pump can be quite critical to FE. Eliminating certain shift sequences, mainly those that REQUIRE a quick and firm "clutch seating" (HIGH torque conveyance), but with the engine at idle or close by, allows this oil pump to be downsized significantly.
Ford (again??) has recently adopted a variable displacement ATF oil pump in the new FWD Ford Edge apparently to overcome this very problem.
D) ALL OF THE ABOVE
Consumer Reports said it no longer recommends V6 versions of Toyota's Camry or V8 versions of its Tundra pick-up because of poor reliability.
CNN Article on Toyota's Reliability
One can only hope that Toyota starts a turnaround, and quick.
1. That the reliability for the Toyota branded cars has decreased from 1st to 5th place. That is significant. I have seen and experienced first hand the slip with my 2007 Camry V6 - which is on attempt #4 to fix the shift flare.
I wonder if Toyota Corporate will notice that their low end brand, Scion, is above the Toyota brand in reliability.
2. That CR does not recommend the Toyota Camry V6 - I am thrilled that CR is telling it like it is. Maybe it will save someone from the heartache I have experienced with my $30,000+ car.
3. Maybe Toyota will see what is happening and make some necessary changes.
I had the same problem in my 04 Accord, new tires needed by 2 years or so. I would have no problems buying new treads but not on a car thats less than 12 months old. I can get by another winter but at what cost? It might last another year but how low of a tread do I want to let my wife drive on. Like I posted b4, Iam pretty much done driving my, MY new Camry, I drive her 05 CR-V.
Thanks for the information on both your postings.
"Customer First" Quality
As vehicles become increasingly complex, Toyota has realized the need to re-vamp the engineering and manufacturing processes. In 2005, President Katsuaki Watanabe took the reigns of Toyota Motor Corporation (TMC) and issued a company-wide challenge to re-prioritize product quality.
The initial steps to guide the quality enhancement agenda began with engineering innovation. He tasked each TMC chief engineer to offer new ideas to improve quality. Everything from tools and processes to budget, was open to discussion. The result was a company-wide agenda called "Customer First."
The program re-allocated assets, allowed more development time, increased headcount, and reverted to the use of additional prototypes to gauge quality during development. Raw materials were reconsidered and assembly was extensively analyzed.
The Highlander development program served as the pilot and featured three critical criteria. First, the process of producing the most comprehensive and accurate original drawings possible was given the top priority. The vehicle would only be as good as the quality of the blueprints.
Second, Toyota accelerated prototype production, increased the number of prototypes, and enlarged the number of quality-check personnel four-fold.
Finally, with these changes, Toyota was able to devote an additional month in the development schedule to address countermeasures.
HL press release
Looks like this approach working out well with new HL since there is no complaints on it's quality so far. Camry team have some catching up to do.
http://money.cnn.com/2007/10/16/autos/cr_reliability/index.htm
This ia a mojor blow to Toyota to have them NOT recommended.
Congratulations to Toyota for receiving a good lesson.
Toyota can't hide behind the broken shield of Motor Trend anymore. Consumer report is the real deal that has the interest of consumers in mind.
Toyota, it's time for you to stop badmouthing the customers complaining about the 2007 Camry and start giving them real help to solve their problems.
Also, have anyone noticed if the air vent next to the driver window still blows when the AC is set to the floor only?
Just for the record, I had the OBC reprogrammed 2 times. It did not seem to affect the performance. When I replaced the air filter, the car did not hesitate when I accelerated from a stop. The old air filter appeared to be clean but it could have been compressed, formed or sprayed with a chemical when manufactured???? Who knows. I know it ran better immediately.
Bobba
I remember many times last winter that it took maybe 10-15 minutes b4 the fog was off the front, the ice also took longer. I work diffrent shifts and sometimes guys warm up their rides for 20-30 minutes. I know thats not good but I might have to do that, IF we get any cold weather here in PA. Its 70 degrees today..
The best thing to do is turn the heat and the blower speed up fully and then switch to the defog/demist/"defrost" mode.
Once the passenger cabin warms up to within a few degrees of your comfort level the system relies EXCLUSIVELY on the use of the A/C for dehumidification and thereby defogging of the windshield.
There are many climatic conditions and circumstances wherein you will have condensation forming on the interior of the windshield and the functionality of the A/C will be a "wild card", maybe it work and maybe it won't.
Circa '04 there are at least three C-best options that are available to help address, but not fully solve, this issue.
Google for:
wwest demist
For more info.
I just got back from a four day trip to Gettysburg PA.! ---- I spent a couple of days going around the battlefield and enjoying some "GOOD FOOD"!!!!! I stopped at "Boyds Bear Country" to pick up some gifts, and I even drove through the battle field at night looking for those "Ghostly Images of Gettysburg" that everyone is talking about!!!! No, I did not see a ghost!
The Camry performed GREAT! ----- On the trip to Gettysburg I had a full tank of Sunoco 87 octane fuel, and I managed to get the "on-board" mileage computer up to 35mpg on one part of the trip at 65mph. I averaged 30mpg most of the time! (No cruise control).
Once at Gettysburg, I had the opportunity to accelerate hard entering route 15. The vehicle pinned my head against the head rest, and the transmission shifted very smooth and quick! This performance was accompanied by a roar from the twin exhaust pipes. It sounded somewhat like a Ford Mustang!
On the trip home, I had a full tank of 87 Off Brand PA gasoline in the vehicle. I averaged 30mpg driving at 65mph.
The vehicle holds the road very well, and it is very easy to control. I checked the engine oil one morning in Gettysburg, and the level was at the full mark. The engine now has 18,000 + miles, and the oil is as clean as the day I took delivery. (As you know, I have the oil and filter changed every 2,500 miles.)
I love this Camry, but I also understand that some people are having major problems with their vehicle. As I have stated before, it is very possible that my style of driving masks the problems. (Example: I do not use cruise control.)
By January,(one year old), I will most probably have between 22,000 to 25,000 miles on this vehicle. I am planning to have the trans fluid changed at that time. (I do this once a year or every 20,000 miles which ever comes first).
Best regards. ---- Dwayne :shades:
This is my first Toyota. It is VERY different in terms of handling.
Mackabee
Mackabee
Denso's real flaw is in automtically switching into cooling mode even in the dead of winter once the cabin temperature approaches the setpoint. In cooling mode no warming airflow is routed to the windshield oftentimes allowing it to cool below dewpoint.
The origins of the design flaw are quite strange indeed.
NipponDenso, Denso US, was granted a US patent back in the late eighties involving a technique where cabin airflow was separately routed, warm airflow predmominantly to the lower levels of the cabin and cooler airflow to the upper regions.
Implementation of the patent involved a fairly complex redesign of the A/C plenum an dthat resulted in not being able to easily route heated airflow to the interior surface of the windshield. So they resorted to the exclusive use of the A/C for preventing and/or removing condensation from the interior windshield surface.
One of the more recent additions ('04?) to the c-best options list was the ability to prevent the system from automatically switching into cooling mode. By '01 they had added two options for these reasons, the first of these allowed the driver to disable the A/C indefinitely by simply turning it off once. The second was to unlink the A/C from operating automatically in defog/demist/defrost mode.
IMMHO it would be potentially dangerous to do so.
I was talking about the vent next to the side mirrors. Air comes out of those unless you manually close them.
The vents near the windhsield allow air to pass through them as well all the time, I believe, which is just how most cars are made. I believe it has to do with circulation and air pressure/resistance.
I WISH...!!!
That's one of the primary FLAWS in the Denso design, in cooling mode, airflow routed from the dash outlet, absolutely NO airflow reaches the interior surface of the windshield directly.
Which is why you need to be careful not to allow the system to switch into cooling mode automatically in colder climate conditions.
When I have the heat turned on (or even turned off) with the air circulation button not turned on and the knob is tured to the floor/feet only, air still comes through the windshield vents and the vents near both side mirrors. I guess I just assumed most vehicles were like that.
In my car, at any setting, air comes out of the windshield vents and the two side vents. I'll check again but am pretty sure.
Before Denso US arrived on the scene it was also common for US manufacturers to provide HEAT to the interior surface of the windshield simultaneously since the possiblity of the A/C being even slightly effective is the result of local climatic conditions and therefore a REAL WILDCARD.
Most cars of european origin, Bosch designs, still use HEAT (and A/C) to the windshield in 3D mode even on the hottest days of summer.
So yes, even though the A/C indicator doesn't illuminate (Toyota/Lexus) you can BET your A/C activates in 3D mode.
"knob is turned to floor/feet only..."
Yes, you can be certain/sure that in floor/feet mode airflow will be routed to the interior windshield surface. For Denso US designs, NipponDenso for asian designs, that airflow will often be as much as 20F COLDER than the warming airflow from the footwell area. Denso at least got that much right.
And yes, unless you manually shut them, system airflow will always come from those side window vents. Apparently, for some reason, Denso thinks keeping the side windows defogged is more important than preventing fogging of the windshield.
Actually that statement is not really fair of me since I am aware that the "upper=cool/lower=warm US patent they have requires a special, unique configuration of the A/C plenum air distribution system that does not easily allow for warming airflow to the windshield whereas it is relatively easy for them to get warm and/or cool airflow to those side window ducts.
Toyota needs to fix this faux pas. Wonder why they've never thought to do it?
Both nice cars anyways and from what I've read, very comprabaly priced. Good job Toyota and Honda!
The Sandman
Camry is kind of in the dumps whether this car would be a good choice.
Toyota slips in annual survey in reliabilty - Camry 6 cyl, Lexus GS and more
http://news.cincypost.com/apps/pbcs.dll/article?AID=/20071017/BIZ/710170305
The suit will allege that the 2007 V6 Toyota Camry is not only defective in the transmission but in several other areas and is unsafe to be driven on U.S. roads.
I got a RECALL notice last week for of all things, are you sitting down? SIT DOWN..
BAD FLOOR MATS..... :confuse:
Funny how dealer tried to push a 2007 SE V-6 demo. No wonder with all the tranny problems.
The lease rate now is a very good one and ends Oct 31, 2007 on Camry. With all the present issues on the Camry, I would bet the special lease continues through at least December 07. As a former leasing manager and financial executive, I can say that the factor of .00099 is a good one. Shame how so many dealers try to rip off consumers in a lease. Any questions on calculating your own payment, contact me. Glad to help, all you need is a calculator.
What do I do? 05 has 29000 miles and in perfect condition. Neighbor wants it and my lease is up. selling it for 5K over my buyout.
with all the issues on the 07 Camry, not sure and Hondas looking good this year.
I have both a 2004 and a 2005, with no issues to speak of.
Mack