Prius (2010-12) :: Engine Knock At Less Than 4000 Miles
Nov 12, 2010
Temperature outside (weather data): 55F. Temperature gauge in prius: 57F. It felt more like 70F. It's a 2010 Prius III model that is 6 months old and has about 3942 miles and is driven VERY carefully.
I start the Prius and when the ICE engages to warm up. There's LOUD intense engine knock. I immediately turn the power off. After a couple of seconds, I start it again....the ICE engages again and then starts knocking rapidly (it is definitely knocking) and after 10 seconds. It goes back to normal. It was so intense that it may have damaged other components or the engine block itself.
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I once experienced the noisy engine start up.. It sounded like the engine was trying to run backwards or severe pre-ignition.
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My 2011 SE is starting to get some engine knock at 50,000 miles. I don't believe the dealership has ever ran the recommended fuel cleaner through the car. Do you think that would take care of the issue? If I do run the fuel cleaner through it, do I have to use the Hyundai brand?
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So I have searched about engine rattle/knock and I have found lots of results for cold starts but I haven't found it for the issue that I am having. I have a 2010 and anytime the battery is real low, around 2 bars and the ICE fires up to charge it, any time I give it a little throttle input, I get heavy valve rattling. It doesn't matter if its cold or hot, it does it as long as the battery is low. I never get this noise when battery is charged up, only when low. I have a link to the video below and you can see once I give it some input, it starts to sound like an old diesel tractor. Prius has close to 200K on the odometer and all my maintenance is up to date. Please turn the speakers up but the noise is right at 5 seconds in or so.
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4000 miles and I got the Check Oil Level light come on! I know it should not be on this early on. I have not had the 5k service yet. What oil I need to put in there to top it off till the oil change?
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How many miles can be driven after the computer tells you have zero miles left to empty? Or rather how many gallons do you think is left in the tank after the computer says you're empty?
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My 04 6.0 Limited and both front and rear sway bars. The front links keep wearing out after 3-4000 miles. But, I saw someone in here put F350 Sway Bars in their Excursion? REALLY?? Is this right or is this snake oil? Is their another way to fix the front links so they don't wear out so quickly??
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I finally made a recording (attached), I would suggest listening to it with headphones if possible. The noise I'm referring to is featured between the 0:28 and 1:00 marks. You can hear it again from about 1:10 to 1:25.
Just to recap:
2014 GX Premium pkg.
4400 miles
93 Octane always
The sequence of events is such:
1- Car is parked overnight in garage, air temperature is 60 degrees or less
2- Start car, pull out of garage
3- Put car in D
4- Drive to stop sign at end of street
5- The transmission downshifts and engine revs slightly as the car comes to a stop
6- After sitting at the stop for a few seconds, foot on brake, engine at idle, it starts to make that thumping/clunk noise
7- Noise stops once I start moving again, and does not come back once the engine is warmed up
Note: This happens whenever the temperature is 60 degrees or below and the engine is cold/car has been sitting overnight. All accessory systems were shut off for this recording/demonstration (no A/C or heat running, no radio or other accessories on).
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It almost sounds like somebody is taking a small hammer and banging at the plastic cover on top the engine when the vehicle is started new from cold. After about 8 or 9 knocks it goes away.
Taking it to a dealer soon to get it checked.
2010 Model year. 81k miles.
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there is a clunk on the front of my Prius.
When I'm driving slowly and steering I can hear a clunk/knock coming from the front. I can replicate the noise by steering when stationary.
I have taken it in for diagnostics and they couldn't see anything wrong. Where to look?
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My Prius has been sitting in the fridged weather in my driveway. It's Tuesday and the temperature is currently 18F. The last time I drove this car was two days ago on Sunday.
I started it up a few minute ago and heard a HORRIBLE knock or slap from the engine bay. It alarmed me to the point where I wanted to run in and grab my camera but I tried listening to understand what it could be. At first I thought it might be a belt came loose and was whipping around hitting the components but it went away after about 30-40 seconds. It was so loud that I thought the neighbor two doors down who was shoveling snow could hear it.
I will let it sit overnight and will definitely capture this on video in the morning. I have a feeling the noise will be back.
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It looks like, I have the problem with my 2009 Prius, but i was wondering : don't you need any purge of the cooling system after this work is done ? Is there any chance that some air might come into the cooling system during the "clamp" session?
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I know this issue has been posted and discussed multiple times on early Gen 3 Prius'. That said, I don't see much on it regarding the Prius v ( lowercase v for the Prius v wagon, not an uppercase ). There is also of course a TSB for earlier Prius' that had the issue.
I can readily replicate the issue in that almost every time I 'think' it may happen the next time I start the vehicle, it does in fact do so.
If I move the vehicle from the garage to the driveway or around in the driveway to clear snow, the ICE fires for a few seconds then I shut it off as the car is where I need it. Upon the next ICE start, there is a horrible knocking under the hood somewhere. Different from the previous messages and the TSB itself is that I never get an error code or MIL.
I'm to the point where if I move the car, I let it warm up completely. I figure I'm better off wasting fuel than subjecting my Prius to whatever horrible thing is happening under the hood if I don't.
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Have a 2014 Prius III. Was getting 50-60 mpg until i took it in for the 5k mile service. Immediately afterwards the mpg dropped to 43-50 mpg. It seems when the car is cold, it will start in EV mode for a few seconds and then the engine will kick in and it will not enter EV mode for the first few miles even with the battery 80% charged, driving under 20 mph, a/c off and keeping the Hybrid system indicator in what should be the EV range.
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Have owned this car for 8 days and the wife is driving her normal traps, only shows having used 1/2 tank and over 240 miles, something must be wrong with this thing, must take back to dealer,
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I drive about 25 miles each way to and from work. Almost since the day I've purchased the vehicle (6 months), I've learned and used the Pulse and Glide technique daily and I've become very good and comfortable with it. I usually get 65mpg on my way to work and 70+ on my way home.
However in the last couple of days, I've notice a significant drop down to low 50's with no change in my driving habits, route, or tire pressure. Also no work or maintenance has been done to the vehicle. Upon closer investigation, I've noticed that sometimes, well after the warmup stages, when I glide, the ICE stays on and the instant MPG meter only reads 50mpg instead of the infinity mpg it usually does.
It doesn't happen every time I glide, just sometimes. For example this morning after driving the entire 25 miles to work, the ICE stayed on during my last glide of the commute. At first I thought that maybe I didn't let my foot off the accelerated long enough, but further attempts with longer delays resulted the same result of the ICE not shutting off. Should I have the dealer look at the car? Am I missing something?
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For the past couple weeks on the way home from work the ICE runs non-stop for 20+ miles. My drive is 25 miles and the weather has been 105+. In the morning everything seems to work fine. In the afternoon even with the AC off, battery almost fully charged the ICE does not shut off at all even at a stop. I even tried putting it in EV mode and it tells me Not Currently Available. My Prius is a 2012 3 with 5500 miles. Is this normal in hot weather or is there something wrong??? Also the mileage sucks, in the morning with the AC on, weather around 90 I get 55-58mpg. In the afternoon I get low 40's even with the AC off.
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So I posted a while back that my oil at 13000 miles still looks clean at 34k on the Prius . Sent in an oil sample to Blackstone to see what's the break down on the oil. Like I said before I am impress with today synthetic oil and how well Toyota build their motor. Here is the result from blackstone.
Talk to the lab person who analyze the oil. He said he's pretty impressed with Prius motor. He said with the results I can probably go 20k to 25K miles before the next Oil Change look at the result there hardly any breakdown in the oil but their Blackstone wants to analyze the oil at 2000 miles increments.
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As odd as it may sound, our Prius salesman told us we should not use the cruise control on our 2010 Prius II for the first 1500 miles. We could not find any such warning in the manual. Did we just misunderstand or was the salesman correct?
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The oil consumption started around 90-100k miles. My wife mostly drives the car so I just check it and fill it without keeping track of mileage. Last week I had a lot of driving to do so I topped off the oil before starting my trip and put a 5 qt 5-20w bottle in the back. I've been through two liters in 2100 miles! Sheesh - I'm ticked off. I do my own oil changes at least every 10k miles, always use 0-20w or 5-20w full synthetic oil (usually Mobil 1). I replaced the spark plugs at 119k miles per maintenance schedule.
Besides the oil consumption, since 115k miles the engine can get into a mode where it misses a little bit at low power once it is completely warmed up. I have a good code reader and nothing ever shows up. I expected the new spark plugs would fix it, but they didn't change anything about how it runs. It is slowly getting worse. I'm going to wait until a code in the ECU is set before fixing it. It could be an ignition coil. I suspect it is an O2 sensor which causes the AFR to be too lean which makes the mix hard to ignite. Time will tell. It runs fine when cruising at highway speeds.
We bought this 2010 Prius III, not 3, new in October 2010. The only out-of-the-ordinary thing we do is live in northern Wyoming where it can be very cold for a long time. We drive 85 mph for long distances to go shopping and visit friends. The gas mileage is the same as it has always been. It varies between 42 and 50 mpg in the summer and 35 and 45 in the winter.
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Will be going for the 5k tire rotation coupon in a couple weeks as I'm at 4700 miles right now (purchased car in August), but the check air filter screen keeps coming up when I switch the navigation. Why that might be? I thought those are usually replaced around 30k miles.
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