2007 V6 lurching forward when braking? - Toyota Nation Forum : Toyota Car and Truck Forums


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Old 05-06-2008, 07:43 AM   #1 (permalink)
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2007 V6 lurching forward when braking?

Has anyone else experienced an issue when slowing down, the car will suddenly lurch forward or feel like the brakes are not being applied for a brief period of time? My wife doesn't drive my car very often but she noticed this and I think it scared her pretty bad. If this is a known issue, is there a TSB or a fix for it?

Thanks in advance,
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Old 05-06-2008, 07:46 AM   #2 (permalink)
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I've never heard of this. Take it in and have the dealer check the brakes.
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Old 05-06-2008, 08:01 AM   #3 (permalink)
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is it in the first moments of start up? It happens to me once in a while when the engine is cold... it's cuz when you brake to a stop, and the transmission shifts from second to first gear to early, so the first gear revs higher... it think its cuz the car is still trying to warm up the engine
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Old 05-06-2008, 08:36 AM   #4 (permalink)
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Its just downshifting, since its a lower gear ratio it revs the engine higher and sorta give that pulling feeling. Its perfectly normal
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Old 05-06-2008, 09:03 AM   #5 (permalink)
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I think that's part of the engine braking...I think i read about that in a thread on here i can't really remember which thread it was. Cuz my car does it. When u hit the brake a lil light and then hit it again the senses that your tryn to slow down so it the ecu tell the car to shift to a lower girl to help braking..I could be wrong. Its almost like when u hit the o/d button to slow down the car when going downhill..
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Old 05-06-2008, 09:08 AM   #6 (permalink)
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It's just makes it difficult because it almost feels like the brakes cut out for a second. So then I have to apply the brakes harder. When I hit the brakes, you'd think the car would gradually slow down at an even rate. I can't believe this hasn't caused an accident of some sort with someone rear ending someone. I guess I'm just too used to our Chevy's.
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Old 05-06-2008, 09:59 AM   #7 (permalink)
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the brakes are working fine..
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Old 05-06-2008, 10:06 AM   #8 (permalink)
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Quote:
Originally Posted by MunkyPuke View Post
It's just makes it difficult because it almost feels like the brakes cut out for a second. So then I have to apply the brakes harder. When I hit the brakes, you'd think the car would gradually slow down at an even rate. I can't believe this hasn't caused an accident of some sort with someone rear ending someone. I guess I'm just too used to our Chevy's.
It almost sounds like you're whining. You should test drive a car before you purchase it to see if you like the way it drives.

Get used to the characteristics of your car. If you think that there is a safety related problem have dealership service personal drive your vehicle.
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Old 05-06-2008, 11:28 AM   #9 (permalink)
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Quote:
Originally Posted by TRD VVTi View Post
It almost sounds like you're whining. You should test drive a car before you purchase it to see if you like the way it drives.

Get used to the characteristics of your car. If you think that there is a safety related problem have dealership service personal drive your vehicle.
Yes, the OP is complaining about a number of things on his car............
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Old 05-06-2008, 11:34 AM   #10 (permalink)
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Originally Posted by TRD VVTi View Post
You should test drive a car before you purchase it to see if you like the way it drives.
We test drove the vehicle for a weekend before we purchased it. Most of our problems didn't happen until a) we had a cold snap and b) we put over a thousand miles on it. Only then did the paint begin to rub off and show a lusterous lemmon yellow paint job. I still love the car. It just has it's quirks.
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Old 05-06-2008, 03:09 PM   #11 (permalink)
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Quote:
Originally Posted by MunkyPuke View Post
We test drove the vehicle for a weekend before we purchased it. Most of our problems didn't happen until a) we had a cold snap and b) we put over a thousand miles on it. Only then did the paint begin to rub off and show a lusterous lemmon yellow paint job. I still love the car. It just has it's quirks.
That's a pretty lousy attitude, as this is NOT something wrong with your car.

It's just like your "creep" when you put it in reverse -- you're simply not understanding what your car is doing, and calling it a "problem," instead.

Once again, YOUR CAR IS CONTROLLED BY COMPUTERS. And these computers may choose to do things differently than you've experienced in any other cars you've ever driven. And they might even do things that you might think are opposite to what you WANT your car to do.

Your transmission is electronically controlled. Your throttle is electronically controlled. Your braking systems are electronically controlled. And so on. And they are all ultimately controlled by your main computer, the ECU, which has been programmed with a certain "agenda" or two -- "agendas" that might indeed make these systems do things in a way you don't expect from your previous driving experiences, or do things a bit at odds with what you're trying to do.

Mainly, these systems are programmed to do two things above all (or most) others:

1. To reduce emissions.

2. To increase fuel economy.

So, these systems rev your engine high when you first start it, to warm up the engine as soon as possible, which will help it reduce the high emissions made during the usual start-up and warm-up times. And, these systems will shift the transmission in ways that you may not have experienced with any other car.

The six-speed automatic transmission is definitely different than most anything anyone has ever experienced before -- how many of us have ever driven six-speed auto transmission cars before?? That puts more gears, which are more closely spaced, under the control of the car's electronic systems. And, again, the systems are going to use the transmission to reduce emissions and increase fuel economy, to the best extent they can. So, yes, the transmission might well do a downshift to match RPM with the speed you're going, and there just isn't anything wrong with that at all. After a while, you should be able to understand your car better, and come to expect that it operates just a bit different from cars you've driven in the past. I sure encourage you to give the car a chance for you to understand it better!
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Old 05-06-2008, 03:14 PM   #12 (permalink)
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Thanks again for another awesome reply. Really helps understand what's going on.

As far as my attitude being negative, the rattle in the dash, engine flares, and brake squeal are what have me in the dumps. Next week I'm going to see how the dealership will deal with them.
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Old 05-06-2008, 03:51 PM   #13 (permalink)
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Quote:
Originally Posted by 2k4CamThrilla View Post
I think that's part of the engine braking...I think i read about that in a thread on here i can't really remember which thread it was. Cuz my car does it. When u hit the brake a lil light and then hit it again the senses that your tryn to slow down so it the ecu tell the car to shift to a lower girl to help braking..I could be wrong. Its almost like when u hit the o/d button to slow down the car when going downhill..
girls huh...
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Old 05-06-2008, 08:36 PM   #14 (permalink)
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Quote:
Originally Posted by MunkyPuke View Post
Thanks again for another awesome reply. Really helps understand what's going on.

As far as my attitude being negative, the rattle in the dash, engine flares, and brake squeal are what have me in the dumps. Next week I'm going to see how the dealership will deal with them.
OK, I see....

Still, there are TSB's for every one of those -- they ought to be able to help!
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