Prius (2004-09) :: Engine Noise After Running Over Rock On Highway
Aug 13, 2011
We were driving on mt highway and ran over rock. Had the undercarriage checked immediately and mechanic spotted the mark inches from transmission but said all was fine. Last evening the engine began to run very rough and loud particularly when not accelerating; true even when idling/parked. Also noticing a small rattle that is infrequent and disassociated with any consistent pattern. We are in Taos Ski valley at about 8k elevation. Still have two weeks of vacation driving ahead of us.
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I'm loving this 'new' 2004 prius with 177k miles on it that i just bought. In New England winters I'm still getting 40-45 mpg and I'm not even trying to get great MPG's.
1.) Wind noise : My biggest disappointment is excessive wind noise over 55 mph. I 'm using this car as a taxi and its so loud inside I'm a little embarrassed with customers in the car. It sounds to me that its coming from the passenger window or passenger side near the windshield, but I can not identify its location at all. I've always been the one driving when looking for it though.
I called a dealer that sells lots of gen II used prius's and he says its fairly common to replace the window seals? The car has a clean car fax.
2.) Mild clunk when the engine kicks on. Not all the time, but sometimes : Other thing is, I can sometimes feel and hear a mild clunk when the engine kicks on. I also feel a little bit if vibration when the engine is on and i'm idling (it was 16 degrees last night so the engine stays on for heat). The oil level is good. I'm due for change in the next 500 miles.
Is this anything I should be concerned about? I'm sure I'm just overly sensitive.
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In the last couple of weeks I've noticed an occasional noise which sounds like a rock hitting the passenger side of the car. The first few times, that's what I thought it was, but it's now happened a couple of times while I wasn't moving, and today it happened while I was parked! what it is?
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For the past few months I've been hearing a loud fan-like buzzing noise coming from the passenger side of the front of the car. I don't know that much about cars, but it almost sounds like the engine is racing or something is spinning too fast. It has gotten increasingly worse, and seems especially loud at high speeds on the highway.
It is not the heating/cooling fan - the noise is present when the heating/cooling system is turned off.
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I've been traveling on the highway a lot lately for work and it seems like whenever I put my 2006 Prius on cruise speed at around 72-76 MPH, engine noise is through the roof. Now I understand that Prius has a small engine compared to my stronger Camry, but I was wondering to know about highway speed and RPM's for 2nd Gen Prius?
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So the gas engine shut off (I filled up the tank yesterday) when I was on the highway and the engine light came on, the triangle ! light came on and the hybrid system light came on on the GPS screen. I pulled over and turned it off, check the oil, which was a little low, but there is some in there and eventually the gas engine started up again, but it didn't sound very healthy. I need to get to work tomorrow morning...it's at the mechanics and I trust him, but if it's something stupid and silly, maybe I can just do it myself and not get charged for any diagnostics.
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I've been reading up on SHM. It sounds like I need to be able to see IGN to make the most of this technique. I have the Engine Link app (can't afford SCII) loaded with the Gen 2 presets that came with the app. I can't seem to find anything to indicate that I have an option for IGN for my display screen.
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While driving, hear a whirring sound, happens about every ten seconds, lasting for about two...after getting home, shut off engine and this sound continued. Turned on, turned off, still continued. When off, occurs about every 20 seconds.
Continued for the 10-15 minutes I was in the garage. Opened the engine and definitely coming from under the Synergy Hybrid box.
Went out four hours later, and quiet. When I opened the door, sound went on again, lasting for 20-25 seconds....It then stopped and started again, occurring every 15-20 seconds, lasting for about 3 seconds.
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My wife bought a new 2010 Prius Hybrid. It has consistently achieved 51+ miles per gallon. She bought it in June-2010 and at the 7000 mile mark (October?) called me concerned about a noise it was making under the hood. She described it as akin to the noise a playing card made when as a child you fastened it to the spokes of a bicycle. Chattering? It lasted 15-30 seconds and went away, before engaging in reverse or forward. A trip to the dealership was fruitless, an "intermittent episode" the diagnosis.
Now, nothing since until today. Same noise again, 12,000 mile mark, goes away in same timeframe, in park. Only today, through the course of several errands, her dash MPG indicator reads 39 MPG. She is waiting as we speak in the dealer lobby as they plug into the computer hunting for fault codes, etc. Having issues, especially an indicated dropoff in MPG seemingly in conjunction with such a noise?
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After driving 20 min at 40 mph, I came to a traffic stop. The engine was still running, the battery was at 75% full, outside temp 80, A/C set at 75. I noticed the MDF showed no engine running at all. But I can feel a little vibration, which tells me that the engine speed was very low, and not constant, at/below idle speed.
When I finally get home and park the car, the battery was green! Basically the engine kept running even for the last 5 min when I drove at 30 mph.
Does that indicate something wrong?
My car is a 2004 at 222K miles. 12V Battery changed 3 years ago, PCV, spark plugs changed 6 month ago. I've noticed sometime that HV battery is weaker than before, easier to get high engine speed when picking up at 50 mph +.
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I have a 2005 prius, and it has developed a severe vibration when the engine is running. It is only when the engine is running, even in park. I'm thinking it's the motor mounts, but I was wondering if there could be another cause. I do not have a check engine light, and the engine appears to be running fine. the vibration goes away whenever the engine cuts off, and there are no other drivability issues.
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I recently bought a 2007 Prius that is making a rather loud knocking noise that has me a bit perplexed. I know the noise is not normal as my 2005 does not do this.
The noise only happens when the ICE is running and the car is in drive
If the car is in park and you rev up the ICE the noise is not present. With that said I do not think the noise is isolated to something in the ICE as I think it would be present when revving the engine in park.
However is you put the car in drive and step on the brake (to keep the car stationary) while lightly revving the ICE the noise is present. The noise is present every time the car is in drive and you accelerating, even with the lightest of throttle.
It does not need to be under excessive load and with that said I am certain it is not spark knock/per-detonation of the fuel nor does it have the "pinging" sound like a spark knock.
If while driving down the road and the ICE shutdown down while driving at lower speeds the noise disappears. When the ICE starts back up the noise reappears.
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I recently ran very low on coolant with my 2005 Prius and had the overheat light coming on. Immediately before the overheat light came on, I realized that the blower was blowing cold air even though the engine was running. When the light came on, I immediately stopped and refilled coolant at the overflow reservoir and the radiator and let it run through a few times. I have re-topped off the coolant levels and it seems to be holding steady. Hopefully I have not done long-term damage to the engine, but that remains to be seen, and is, of course, very possible given that I let it get so low.
A symptom I have right now is that when I turn the car/engine on, hot air does not come out of the blower. If I remain in park, when the engine turns off, hot air begins to come out. When the engine kicks back in, the hot air stops. What this may be a symptom of?
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I've noticed lately that my Prius (2008) sometimes decides to keep the ICE running even though the engine is warm and the gas pedal is not depressed. I can pulse and glide (with the engine off during glide) the first 5-10 minutes of driving, and then all of a sudden the ICE starts running constantly. I have to press the EV button to be able to glide. Quite annoying... I bought the Prius just to get rid of the ignition jerking.
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We have a 2005 Prius with 77,400 miles on it. My wife came home from a short trip yesterday saying the engine was shaking the car and the CEL was flashing. About 4 months ago we also had the CEL come on but not flash and it ran a bit rough but not as bad as it is now. I was told by our local dealer that a flashing light is worse than if the light comes on and stays on. When this happened 4 months ago at 74,000 miles the dealer said they downloaded codes P300, 303, and 304 and that I needed to replace all 4 fuel injectors.
I realize that 300 is a general misfire code and 303 is a misfire code for cylinder 3 and 304 is for cylinder 4. After reading some advice on here 4 months ago, I cleaned my MAF sensor, ran some fuel injector cleaner through a tank of fuel, replaced all 4 spark plugs, and started buying Chevron gas. The CEL stayed off and our mileage went back to normal. I thought I had solved the problem but now this after 3000+ miles. I checked all the ingitors, connections, spark plugs, and wires yesterday and all seem to be in good condition. Maybe they were right and the fuel injectors are going bad. I am at a loss as what else to do other than take it back to the dealer now and plan do that this afternoon.
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why the engine keep running but no charging and no driving? the car was down hill, the battery was fully charged (green), I did not accelerate ( my foot was not on the paddle), but the engine sometimes keep running with a very low gas consumption. this become more often in winter, even when car stopped. I would like to know is this normal for Prius or there is any I can do to improve this?
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2004 prius with 170k. Basically , his engine just doesn't shut off. battery is full. Engine keep running at the stop signs, in park. No engine light on.
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On our 2008 Prius, while the brake assist pump is running I get a steady thump-thump-thump-thump noise, as shown in the video below. If you put your foot on the brake the noise stops. The brakes operate fine and there are no warning lights on. What this might be? It's coming from the passenger side of the car, and oddly it's loudest under the car near the back seat. 86,000 miles on the car.
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I have a 2001 chevy metro 4 cyl. with 13 inch wheels and automatic transmission. The engine rpm's are running high at highway speeds. Would a larger diameter wheel support this situation?
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My 2008 Prius has started making a noticeable soft whirring sound whenever the engine is running. You can hear it both inside and outside of the car. The sound lasts exactly 30 seconds, then pauses for 4 seconds, than repeats . When the car is turned off, the sound can be heard for about another 10 minutes before it shuts off entirely.
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2007 Prius. It is a very cold day (5 F) and it won't start. I pushed the button as usual- first time the keys were still in the house and it did give the indication. Then the panel lit up normally but wouldn't go into reverse. Then I tried shutting down, had to hit the button a few times, and now all I get is the check engine light and a fan is running somewhere. The other thing to note is there was a beeping when I opened the door when I first got in and was running around getting the keys etc.
I have two little ones who don't like me to spend time on the computer, so I did a quick look around here and saw that the red triangle symbol with the exclamation point means the 12 volt battery is low. I get that warning on and off for probably at least a year... couldn't find any information on it in the manual so I was just ignoring it. Does this mean my 12 volt is completely dead? Is that the hybrid battery or the regular battery like in a regular car?
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