intermittent vrooming

paulagoodfellow · 11-08-2007, 10:06 PM

I was at a stop light in my new 2008 Prius. Totally stopped, with my foot on the brake. The car started making vrooming noises, sort of like the gas motor coming on. They lasted for about 3 seconds each, with a second or two in between. This happened a few times before the light changed, and stopped when I started driving. I had about 1000 miles on the Prius then, and have driven another 100 miles since, without it happening again. Anyone know what that was?

qbee42 · 11-08-2007, 10:16 PM

What was your state of charge (SOC)? If the battery has a very high SOC, the control system will spin the engine without gas to burn off some of the extra charge. By any chance had you just descended a big hill?

Tom

paulagoodfellow · 11-09-2007, 12:21 PM

<div class='quotetop'>QUOTE(qbee42 @ Nov 8 2007, 10:16 PM) [snapback]537066[/snapback]</div>

Quote:

What was your state of charge (SOC)? If the battery has a very high SOC, the control system will spin the engine without gas to burn off some of the extra charge. By any chance had you just descended a big hill?

Tom
[/b]

I had just descended a big hill, and I'll bet you're right. I didn't have the screen so that I could see the SOC, and had to start up again before I managed to get to it. Thank you-- Paula

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11-08-2007, 10:06 PM	#1
paulagoodfellow Junior Member Join Date: Sep 2007 Posts: 13 My Car: Model: Package: Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	I was at a stop light in my new 2008 Prius. Totally stopped, with my foot on the brake. The car started making vrooming noises, sort of like the gas motor coming on. They lasted for about 3 seconds each, with a second or two in between. This happened a few times before the light changed, and stopped when I started driving. I had about 1000 miles on the Prius then, and have driven another 100 miles since, without it happening again. Anyone know what that was?

11-08-2007, 10:16 PM	#2
qbee42 Senior Member Join Date: Mar 2006 Location: Northern Michigan Posts: 10,474 My Car: 2006 Prius Model: Package: #7 Thanks: 94 Thanked 387 Times in 289 Posts Friends: 10	What was your state of charge (SOC)? If the battery has a very high SOC, the control system will spin the engine without gas to burn off some of the extra charge. By any chance had you just descended a big hill? Tom