Prius (2004-09) :: Loud Bangs Under The Hood - Rough Engine Shut Down


May 4, 2011

Yesterday afternoon after warming up (car still in park) the engine shut down was very rough. I heard a quick string of maybe 5 or 8 loud bangs under the hood. Sounds like something got loose and banging inside the engine compartment and ready to fall off at any moment. This morning it was just a bit rough but not nearly as scary. Other than that the car seems to work fine.

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Battery died. Got jump start but the guy crossed the jump cables. When positioned the cables correctly , the vehicle started normal but during the drive, heard two loud bangs on the engine; then the car shut down. Towed car to the dealer and they replaced the battery and the master fuse. The dealer rep. told me that the ABS light was still ON. Two days later I took the car from the dealer with The ABS, tire, BRAKE, EPS, skid, and engine lights ON and the steering is hard as well.

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I have a new problem that I only discovered a few days ago. As I come to a stop at a traffic light, turning out of somewhere or whatever if I give the car a little more gas than normal not that I punch it or anything from a stop the car bogs down and bangs a little rough like I was rear ended. The car is in drive when it happens. Its just fine any other time. I was told it could be as simple as a bad tps or as bad as a defective torque converter or tranny. Its a 2005 gls hatchback with the 1.8L. also, the engine has been running a little rough recently too if that could have anything to do with it. No warning lights are on either.

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Ford F-150 (2004-2008) :: 2005 STX - Hard / Rough Starting When Engine Shut Off For More Than A Few Minutes After Driving

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I have driven 25,xxx miles on my 2010 Prius. Three times during the last thousand miles I have experienced very loud and scary engine noises during start up. The car had sat for at least ten hours outside in 20-30 degree weather.

I took the car into the dealership for an oil change and my service advisor told me that Toyota was aware of the problem and the noise was not coming from the engine- but a device that mates the ICE with the electric engine. He told me that although it was a loud and dangerous sounding noise, it was not something that would harm my motor. I asked that the noise be logged into my service record.

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Prius (2004-09) :: 2006 Engine Noise - Loud Fan Like Buzzing / Especially Loud On Highway

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It is not the heating/cooling fan - the noise is present when the heating/cooling system is turned off.

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I noticed my car hiss and hum from under the hook after shut down, for a few minutes. What is it doing?

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When cruising around 45 mph - right between where it wants to be in top gear or not - if I slightly accelerate the trans BANGS between the two gears.

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What gives? I can usually stop it if I turn on the towing button - shutting off high gear.

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Anyways it's because of its oil consumption and me not being used to having a car that needs its hood opened between oil changes that I've worried and wondered if I forgot to check it and it gets low enough to make the oil pressure drop will the hybrid system turn the engine off assuming I'm going slow enough for it to do so? I understand if I'm going over ~40mph the engine has to be spinning to prevent MG1 from over-revving.

So lets say I'm doing 65 on the interstate and the triangle lights up then I slow down and come to a stop will it prevent the engine from turning back on, or I'm sitting at a light and the engine is running because the heater is on then the oil pressure drops will it prioritize protecting the engine over the heater? Or is it like a typical car it will warn me but it's up to me to stop the car and turn the engine off as fast as I can to lessen the damage that is being done?

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Prius (2004-09) :: Way To Know EBH Is Working - Gas Engine Won't Shut Fast?

How can you tell if the EBH is working? I thing there is a little bit more heat coming from the vents, but its hard to tell. I am thinking of putting the car on ramps and touching the block next to where the EBH is. The gas engine doesn't seem to be shutting off any faster.

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I thought maybe it was because it's cold-- we've dipped to single digits, but have been above 30 or so the last week or two and has only happened in the past two or three days. It happens at start up and at the end of my hour long commute to work. I've turned off the defrost and heat and it still does this.

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