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post #11 of 18 (permalink) Old 08-08-2007, 09:13 PM
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Incidentialy, yelling, screaming and squirming tends to get a better braking reaction out of teens than pulling a parking brake. I know, I've been there.
Been there too. Plenty of practice is essential.....but there is always a first time on the interstate, a first time in rush hour, a first time with a crazy driver behind you, etc. The real key is that an experienced driver has a "sense" when another driver cannot be trusted to stop at the red light or stop sign. The brand new driver does not. The center parking brake can be a difference for that 1 in 10000 times that would matter. Have had no need to use it, just would like a parking brake on certer console instead of the floor.

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post #12 of 18 (permalink) Old 08-08-2007, 09:52 PM Thread Starter
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So it has been a week, about 400 miles, about 45MPG, and I have yet made my first fill up. It has been a combination of medium trips on ďcityĒ streets (~40MPH with stop lights), short trips (~10 minute), and highway driving (~70MPH). I really enjoy what when you are stuck in slow-moving traffic you can enjoying numerous 100MPG bars and still keep cool with the A/C running when you would normally be wasting gas idling.

One thing that I have noticed is that when the gas engine cuts off within the first couple of minutes of driving it are fairly rough. Also the few times that I have been idling it seems to be a little rough. From reading the forums it seems that the first one is normal but Iím not sure about the second. It isnít major but it is enough to be noticeable. While actually going down the road it has been very smooth.

Another thing that I really donít care for is the high-pitched hums and whines that you get over the stereo when using the AUX input. They are in time with the regen/acceleration so are probably some sort of interference. You canít hear them at anything below volume 10 but once you step it up to volume 15-20 they are very annoying. My audio player (a PDA phone) is cranked as high as it can go but sometimes soft songs need to be turned up to overwhelm the road/fan noise.

I have been used to the parking brake down on the floor for my entire driving carrier so having it down there with the Prius wasnít a shift for me. When I drove the Civic having the shifter and brake lever in the center console was a negative instead of a positive. I like the empty space and extra storage that the Prius has in the center console. The parking brake most certainly wonít stop the car; especially if the driver has the foot on the accelerator. Iíve accidentally pulled out from my parking spot with the brake on since the Prius doesnít beep at you when you do so. Iím getting used to shutting it off as part of my ďpower upĒ routine.

As for the mirrors my standard adjustment of having a car leave the rear mirror and then immediately become visible in the side mirror has left blind spots to either side for me. There was no such gap in my previous vehicle so I have to be extra careful not to switch lanes into another car as Iím not used to looking anywhere other than my mirrors. For the Prius it seems to have to do with the fact that you can see a lot of the sides of the car in the rear view mirror, space that if you could see out of the car would mean plenty of coverage on the mirrors. Certainly nothing that makes the car un-drivable but still something.
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post #13 of 18 (permalink) Old 08-09-2007, 08:25 AM
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Originally Posted by stephen2002
One thing that I have noticed is that when the gas engine cuts off within the first couple of minutes of driving it are fairly rough. Also the few times that I have been idling it seems to be a little rough. From reading the forums it seems that the first one is normal but Iím not sure about the second. It isnít major but it is enough to be noticeable. While actually going down the road it has been very smooth.

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Yes, both are normal. You won't even notice after a while.

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post #14 of 18 (permalink) Old 08-09-2007, 10:52 AM
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[quote="stephen2002"]

Another thing that I really donít care for is the high-pitched hums and whines that you get over the stereo when using the AUX input. They are in time with the regen/acceleration so are probably some sort of interference. You canít hear them at anything below volume 10 but once you step it up to volume 15-20 they are very annoying. My audio player (a PDA phone) is cranked as high as it can go but sometimes soft songs need to be turned up to overwhelm the road/fan noise. /quote]

Is your PDA phone using vehicle power? There is a "ground loop isolator" you can purchase to eliminate the interference. I think it was available from Crutchfield.com.

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Pearl is a 2007 Driftwood Pearl Prius
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post #15 of 18 (permalink) Old 08-09-2007, 12:48 PM Thread Starter
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I do usually have it hooked into the power plug next to the Aux jack. I'll have to try unplugging it to see if it makes the sounds go away.
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post #16 of 18 (permalink) Old 08-10-2007, 04:35 PM
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I have a 2001 Prius and a 2007. Both have engine shutoffs that are smooth and one shutoff every now and then that is rough. This is more so on the 2001. However, it has been the same over all six years.

One aspect of shutting the engine down is that the ECU positions the crankshaft to a certain position for the next startup. It might be this "positioning" effort by MG1 at shutdown that causes the extra engine movement in some cases. Just a thought.

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post #17 of 18 (permalink) Old 08-10-2007, 08:17 PM Thread Starter
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How long do you generally go before you have your first engine shut down? I notice the most roughness if I get going and then come to a stop within the first 30 seconds or so. If I donít stop for long the engine will not shut off however if I sit for more than about 5 seconds the engine shuts off with a couple of shudders; it is almost as if it can't figure out if it would rather let it run or shut it down. After about a minute it is almost smooth but not quite. After everything has warmed up the engine shutdown has been perfectly smooth and essentially unnoticeable. After it has warmed up it pretty much always cuts out as I roll to a stop instead of after I have stopped.

I just did my first fill up yesterday with no problems. 432 miles and 10.568 gallons. MFD said 44.9 MPG and my math says 40.9, quite the difference there. Iíll have to see how it is on future re-fills.
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post #18 of 18 (permalink) Old 08-11-2007, 12:33 PM
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My car Pearl sleeps in a garage with a manual door. It takes me 30-50 Sec after backing out to close the doors and walk around to the car, get in, fasten my belt, and put it back in "R". The engine usually shuts off about then. It restarts as soon as I press the accelerator pedal once I put it in "D". Coolant temps are usually around 50C at that time. Also, the ICE doesn't start until about 10-15 sec. after I start the car, usually about when I have backed out of the garage.

Pearl has rough shutdowns quite often. Seems normal to me. I don't remember rough shutdowns very often when the car is moving though. It's usually when it's stopped. Crankshaft positioning is a good theory, as it seems to die, then cough, then die. I didn't notice the engine restarts when driving at first, but do now, as I'm usually trying to get the best mileage I can so I pay attention to what's happening.

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