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08-30-2006, 09:06 AM | #1 |
Drives: Yaris LB automatic Join Date: Jun 2006
Location: Wisconsin
Posts: 21
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Reluctant upshift to 3rd while cold (auto trans)
My Yaris Liftback automatic now has about 5500 miles on it, and it's been doing something a bit strange in the morning. I leave the house and go about .25 miles and 2 stop signs at less than 25 mph before turning onto a 35 mph road. When I accelerate on that road, it doesn't want to shift out of 2nd. So, at 30 mph, the engine's at 3000 rpm (I have a Scangauge).
If I back off the gas at that point, i.e. stop accelerating, but don't take my foot off entirely, it stays in 2nd. If I back off enough that the car starts slowing down, it will finally upshift. The cold light is on during this time. Once the cold light goes off, everything's normal. I know it's not supposed to go to 4th gear until cold light goes off, but it seems rather strange for a cold engine to want to be above 3000 rpm. Has anyone else run into this? I've only noticed this recently, but then the weather was a lot hotter during my earlier miles. Also, when I first start it in the garage with it still in park, it ramps up to over 1500 rpm. Seems rather high to me. It gradually comes down, or will drop when I shift to reverse. Paul |
08-30-2006, 10:48 AM | #2 |
Drives: '07 Yaris Sedan Barcelona Red Join Date: Jun 2006
Location: Georgia,USA
Posts: 94
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I have noticed the same with my auto sedan. This was discussed on another board I participate in. Seems like a common problem (if it is a problem) in cold starts /driving. I usually let the car warm up a minute (cold lite goes out) before taking off.
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08-30-2006, 12:41 PM | #3 |
Super Moderator
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Same happends to me.
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08-30-2006, 12:48 PM | #4 | |
Banned
Drives: LB Join Date: Jul 2006
Location: OH
Posts: 7,787
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Quote:
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08-30-2006, 02:03 PM | #5 |
Drives: LB-Auto-PWR-ABS-Cruise-Springs Join Date: Aug 2006
Location: Richmond, VA
Posts: 1,065
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I have seen/felt this as well. I don't have a tach so I cant really tell if it in 2nd or 3rd gear when it does it...
While searching for info I found this awesome PDF on yarii.com. Specs for the engine and systems. Last edited by nsmitchell; 08-30-2006 at 02:16 PM. |
08-30-2006, 02:30 PM | #6 |
Same thing has happened to me. When I went to test drive my Yaris the guy at the dealership said the cold light stayed on until it was at "operating temperature". My friends XB also did the same thing. He would wait until the light went off to drive his.
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08-30-2006, 03:01 PM | #7 |
Drives: Silver Hatchback Join Date: Jul 2006
Location: Tennessee
Posts: 150
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actually the owners manual states its better for the vehicle to reach operating temperature while driving(gently). At a standstill its bad for the engine.
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08-30-2006, 03:32 PM | #8 |
now in HD
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just a thought- the engine and catalytic converter needs warming up- staying in the lower gears (but at the same time not letting the revs go high) lets that happen as quickly as possible.
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08-30-2006, 04:40 PM | #9 |
HardlyDangerous
Drives: 09 Yaris LE, H/B, auto Join Date: Jul 2006
Location: Ridgeway Ontario
Posts: 573
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Don't worrry about it !
It's not a problem it designed this way... just like most cars with locking tourque convertors or over drive they don't upshift until properly warmed up. My Laser and my S-10 took severl miles of driving before it shifted and the TCL worked normally. In the winter it is held back even more My advice is let the car warm up 30 seconds to a minute and then drive it easy until the "cool" light goes out then you are good to go. |
08-30-2006, 05:47 PM | #10 |
Small Car Lover
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Actually this is "normal." For auto trannys as far as Toyota's go. It did the same thing with my 87 Van (previous car) and it does it with my 03 ECHO, don't notice it too much in my moms 2000 Camry but I'm sure it does it.
Its for emissions, when the engine is cold it pollutes the most (think of bad morning breath ), so to warm it up fast it won't upshift into overdrive (4th gear)-obviously an engine pollutes no matter what its just more when its cold. That's from what I read and yes when the blue light goes off it will upshift into the highest or higher gear. Although this is weather effected so in colder weather it will take a little longer to warm up which is a give in. For me its annoying at times but I've learned to deal with it, there are bigger fish to fry...or bake or microwave, whatever you like!
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08-30-2006, 06:48 PM | #11 |
Drives: Yaris LB automatic Join Date: Jun 2006
Location: Wisconsin
Posts: 21
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Thanks to all for the feedback. I feel better knowing it's normal, though I'm not sure it's that great for the engine. I like to keep revs low when the engine's cold.
And I have been driving that block easily - it's not that it's shifting late because I have my foot in it. I've taken it extra easy accelerating there because it will generally upshift sooner if you're not accelerating hard. Oh well - guess I won't worry about it. As for letting engine warm up in garage, I've always heard that's worse for the engine than driving it cold (as long as we're not talking sub-zero temps). So, do you guys also find the revs shoot up to 1500-1700 or so when you first start it cold? Paul |
08-30-2006, 06:54 PM | #12 |
HardlyDangerous
Drives: 09 Yaris LE, H/B, auto Join Date: Jul 2006
Location: Ridgeway Ontario
Posts: 573
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it's better for the car to hold the shift and run at higher rpm with little load then run hard under heavy load.
It does not hurt the car to warm up for 30 seconds before driving off. it gives the cylinders a chance to warm up and expand a bit reducing the affects of cold seizing/4 point scuffing from revving or running a cold engine under load. |
08-30-2006, 08:23 PM | #13 |
Drives: two yaris liftbacks Join Date: Jan 2006
Location: kalispell, montana
Posts: 351
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I was taught by my dad years ago to always have your engine warm up idleing for around 5 minutes before you take off. As a couple of guys have mentioned. Engines are built to run heated up not cold. My one truck has 160,000 miles on it and the engine on it is like brand new my mechanic has said. Plus I only use mobil one oil.
But always warm your engine up for a couple minutes before you put any torque on the engine. Works for me anyway. I know in this rush rush world everyone has to hurry. So good luck. |
08-30-2006, 08:28 PM | #14 |
Super Moderator
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This car does not need to "idle" to warm up, for any amount of time.. Toyota suggests driving slower to gradually get the engine up to operating temp., before driving high speeds.
Also, no amount of idling will warm up your transmission fluid (automatic), it needs to go thru the gears, to get the oil circulating/warming up.. so once again, driving a little slower/cautious the first few minutes is better then sitting in the garage warming up... plus your just wasting gas. All info above can be found in the Yaris shop manual. |
08-30-2006, 08:51 PM | #15 | |
Drives: two yaris liftbacks Join Date: Jan 2006
Location: kalispell, montana
Posts: 351
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Quote:
Last edited by foober; 08-31-2006 at 06:22 PM. |
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11-30-2006, 02:35 PM | #16 |
Old Folks
Drives: 2007 Yaris LB, 2006 4Runner V8 Join Date: May 2006
Location: Vancouver, USA
Posts: 222
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There was a noticable switch in the recommendation for warming-up an engine from sitting there for 3-4 minutes to just drive-off gently, something like 30 yrs ago.
We drive-off gently rather than sitting there and warming-up. In all but one case (a 1986 Trooper - rebuilt around 160K miles), our engine has outlasted the rest of the vehicle. Our HB stick-shift also revs up to around 1,500 RPM when started cold, per the ScanGauge. We have about a 4 block drive to the 1st main intersection and the engine usually gets to (or close to) 130 degrees - where the cool engine light shuts off. However, "normal operating temp" appears to be in the 184-190 degree range.
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12-01-2006, 05:13 AM | #17 |
New Guy
Drives: 2006 Toyota Yaris 2dr hatch Join Date: Jun 2006
Location: Ontario, Canada
Posts: 12
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Most modern cars are designed to drive right away without idle time. In some parts of our world it is actually illegal, allthough not often enforced, to idle your car as to not contribute to our ever growing SMOG issues. I think you will discover in the very near future that these laws will come into effect here also.
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09-12-2007, 11:11 PM | #18 | |
Banned
Drives: 2007 Yaris LB Join Date: Mar 2007
Location: Orange County, Calif
Posts: 284
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Quote:
The late shifting of the auto tranny while driving happens until the water temperature gets to 130F, then the car will shift as normal...this is the car's way of warming up while yuo drive....don't waste gas with idleing....you only fool yourself when you do this, and the car has no benefit. None, over just driving it immediately, slowly at first. |
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