Prius (2010-12) :: Knocking (Raptor Sound) At Intermittent Times While Driving
2010 Prius making knocking sounds. Not exactly the "death rattle" that sometimes happens when you first start the car.
* While driving, the sound reminds me of the Raptors in Jurassic World.
See example videos:
Knocking at idle (Knocking Noise starts at ~19 seconds into the video):
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Knocking while driving: (Good examples at ~24 seconds into the video):
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Knocking while driving with Torque OBD2 Monitors: (Noticeable example starts at ~28 seconds into the video):
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The car has over 300K miles and the problem started a few months back. At first the sound only occurred while driving under certain load conditions.
The problem would occur at intermittent times. Normally at low speeds with heavy loads (going up hill with low to medium acceleration). Also occurring for a short time when letting off the accelerator. Never occurring at moderate to heavy acceleration. Never at idle. Recently the shaking / raptor noise started to occur while idling.
* This problem is now easily created at idle each and every time the HV battery drops below 2 bars and requires charging. The engine change is immediate and starts and stops in sync with the extra load of the HV battery charge cycle.
Placing the car in the maintenance mode, the car will start and idle normally then immediately start and stop the knocking when it switches from HV charging to non-charging mode. There are no Check Engine light. Things I've done to troubleshoot the problem:
* Swapped the following parts with another working 2010 Prius.
** Coils and spark plugs
** VVT solenoid
** Cam Sensor
** EGR Valve Control
** Fuel Injectors
** MAF Sensor
** MAP Sensor
** Evap Control Valve
* Cleaned the intake manifold (It was full of carbon)
(This was done about a month before this problem started to intermittently appear). Prior to cleaning the intake manifold the car was shaking and misfiring under certain high torque condition and generating a P0304 check engine code). Once I cleaned the intake manifold the problem was fixed. I had no more check engine incidences and the shake was gone.
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The car is a 1997 pontiac sunfire 4 cyl 2.4L.When the car is turned on it makes a sound like the one in the mp3 file that I've attached. Some other symptoms I've noticed is a very slight loss of power while accelerating, and whenever I pull up to a stop and the engine gets into the idle rpm range (800-1000) the oil light comes on and the rpm dips to about 400 and sometimes the engine dies. The engine is also running very very hot, although I haven't driven the car in about 2 months and it's 100 degrees outside, not sure if that's related.
What I have tried so far is replacing the oil and filter, and adding 2/5 a pint of seafoam engine additive for 4 quarts of oil as per the instructions on the bottle. I did this because I suspected it was a stuck lifter, but after driving it for 30 miles with no improvement I'm starting to think otherwise.
As some of you may know I'm not entirely mechanically inclined and that's why I'm here, sometimes I get posts from people who insist I shouldn't be anywhere near an engine but let's try to keep those negative posts off my thread.
Camry :: 2010 Motor Making Knocking Noise When Car Sitting At Idle In Drive Or Reverse
Sometimes when my car as sitting at an idle in either drive or reverse the motor starts to make a knocking noise from the back of the motor towards the firewall side on the top of the motor. I have a video. The car has 114k I just changed the oil I thought maybe it's low but it's not and hasn't moved since it was changed.
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I got new 2010 golf almost a month ago. And I drove just over 1000k so far. Couple of days ago i noticed that sometimes (very randomly) when i stop some knocking sound starts coming from rear (i think somewhere around passenger side). As i stand at alight and the sound comes on, the sound disappears if i take my foot off the breaks and then appears again if i push the brakes. The sound usually goes away in about a minute. Again, the sound is quite random so I'm not able to reproduce it.
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I have a 2015 Elantra GL. These past couple weeks I have noticed the following:
1) After a long drive, there is a sort of "knocking" sound at the back of my car. It's not too loud but still noticeable. It seems to go back and forth from left to right to left to right, etc.
2) The sound ONLY appears at low speed (under 30km/hr or 20mph) AND when the ride gets a little bumpy (i.e. when I drive over the bump to get into my driveway). It doesn't take a big bump, just a little.
3) The sound ONLY appear after a long drive. When I start driving to work starting on my local roads at low speed over some bumps, there is no sound. But once I reach my work parking lot and I'm driving slowly and there's some minor bumps, I hear the sound. After work when I'm in the same parking lot going at the same low speed over the same bumps, there is no sound. Once I reach home and driving slowly over local road and over driveway bump, the sound appears.
The car is only at 5000km right now. I haven't gotten an oil change yet or any servicing on the car whatsoever. I will be bringing my car into the dealer for it's first oil change in a couple weeks and will ask them about the sound there. To summarize, the sound only appears once I've driven it for awhile (it never happens at start of drive) and if it's going low speed and if it gets slightly bumpy.
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Dealer calls GM and they say to reset computer....... three weeks later check engine light comes back on....... GM now says to dealer it needs a new engine computer. Not an hour after I pick the car up from it lastest stay at the dealer the light comes back on. GM doesn't know what it is. The mechanic at the dealer is awesome he did some research and thinks the problem is the gas. I now need to put in 90 or above so the engine won't knock. Not happy right now I didn't think that I would have to put in a high octane gas when I bought the car. Terrain owners do you have to put in a high octane gas?
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The issue is, when driving at low speeds, especially after coming to a stop, I hear this intermittent knock that comes from the rear of the vehicle. I am not sure if it is coming from the outside or inside, but it really sounds like it is coming from the chassis.
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I am noticing a sort of clunk or knocking noise from under the hood when I hit the brakes. I thought it might be the pads, but it comes from under the hood .It only makes the sound on the first touch of the brake, once you have your foot on the pedal it stops the noise. It does this every time on the first application of the pedal. Is this sound normal? I don't recall hearing it when I test drove the car, maybe it's been there all along and I am just now making note of it.
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I told them that my car sometimes when I accelerate a knocking or rattling sound comes from underneath the hood. I asked them to check it. I told him it sounded exactly like an older car I had many years ago which was the result of bad gas or too low octane.
With my older car I added higher octane gas (89) and the sound went away. I had a 2011 Prius before and never had this problem and I get gas at the same gas station for years.
So the mechanic test drove my car and said they couldn't find anything wrong with it. So I'm stuck with the annoying rattling/knocking noise when I accelerate (which happens about half the time), but now I'm experiencing another problem.
A couple days later I drove to get dinner. One way it is about 7 miles. Almost the whole way the ICE would not turn off. I would be at stop light, wouldn't turn off. I pulse and glided, when I glided the ICE remained on. Take my foot off the gas at slow speeds, ICE still on.
Finally towards the last 1 or 2 miles it started going into EV when i let the foot off the gas. On the way back it ran normal. It's been close to a week now since I brought it in for service and I only had trouble one other time.
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I was driving the other day, and all of a sudden it started with this horrible knocking sound. I have never heard the sound before. I remember back in the day, with a 67 buick rivera, that if the oil got low, the engine would knock, and this kind of sounded the same, but more high pitched and clicky. I checked the oil first thing and there is plenty in there - in fact, I had just checked and put oil in it about two weeks before.
I have not always kept up with the oil changes, and sometimes the oil level was pretty low. My sons tell me that the sound seems to be coming from the top of the engine, and it's probably toast, a rod knock. I parked it, and figured i will get it looked at in a few months, when I'm better able to pay for diagnostics.