Prius (2004-09) :: 2007 - Whining Noise From Engine Compartment (Proportional To Acceleration)
I need to diagnose an issue I've had with my 2007 Prius with 79,000 miles on it. Several months ago I noticed a distinctive whining/humming noise coming somewhere from the engine compartment of the car while driving. The noise may be present at lower speeds, but the volume of the noise appears to increase proportionately with my acceleration and as such is most noticeable at highway speeds of 50 - 70 miles per hour. As I accelerate faster, the noise level seems to increase. If I take my foot off the gas and coast, decreasing speed, the whining noise gets lower in volume. I believe I first noticed this noise about 6 months ago, but wasn't more proactive about it like I normally would be because at first the noise didn't seem overly loud and my extended warranty unfortunately was up once I hit 77,000 miles. Now 6 months after I first noticed the noise, I believe it's definitely louder than it was when I first heard it, so much so that I can pick it out over the radio being on at a decent volume.
After checking some forums I thought the culprit might be a wheel bearing. I took it into a local Midas shop at they informed me that my passenger-side front wheel bearing was actually breaking apart in pieces. Obviously I had that wheel bearing replaced but I was also hoping this was the source of the whining noise. Unfortunately that wasn't the case as driving it home the noise was still present. They also said the tires were not balanced properly (from my Toyota Dealership no less when I had them install new tires) so I had the tires rebalanced as well. They did take the car for a test drive but probably stop looking for issues with the car as soon as they saw the wheel bearing in that condition. Also that shop does not specialize in Prius' or hybrids so they might not be able to notice the noise that shouldn't be there like I can.
Other than wheel bearings, where this noise could be coming from. Some posts on here possibly pointed to the ICE water pump or transaxle fluid (which as far as I know has never been replaced since I bought the car new).
Prius (2004-09) :: 2007 - Rotational Noise On Acceleration / ICE Won't Start
I have a 2007 Prius that had a rotational noise on acceleration. I pinpointed the noise to the transmission area and suspected something was wrong with the electric motor. I took it to a local transmission shop and they disassembled the transmission to replace a bearing.
After repairs, they called me and informed me that the hybrid battery needed to be replaced. I've been driving the car for about a week with the noise and had no indication of a battery problem, or any other problem.
I had them tow the car back to my shop. The hybrid battery was discharged. The battery blocks were all between 10 and 12 volts. The vehicle would move slowly, but the ICE wouldn't start up to charge the battery. It had one DTC for hybrid battery malfunction.
I removed the battery from my own Prius and installed it in the car. The ICE fired up right away and shut off soon after, which would be completely normal in my car. But the engine never started again. I drove a short distance all on electric. The battery bars depleted quickly. Regen braking was not operating. There was a shudder every so often on acceleration. I'm not sure if it's in the transmission or the ICE is attempting to start? There are no DTCs so far.
The screen indicating where the power is going indicates that the engine is ON and delivering power even when it clearly is not. Not sure where to go with this one. It seems really odd that the ICE started once and won't start up. I tried disconnecting the battery and starting over, but the ICE still does not start up. I looked around the transmission for something disconnected, but found nothing.
Prius (2004-09) :: 2006 - Rattling Noise Coming From The Engine Under Acceleration Only
i have been hearing a rattling noise coming from the engine under acceleration only. It isn't a super consistent rattle, seems to only happen when accelerating from lower speeds. And sometimes you don't hear and other times you do. It's not a bad rattle or knock it's more of a ticking/light rattling sound that is definitely abnormal.
I know my brake accumulator is barking at me and the 3 way coolant valve is going bad as sometimes I get a constant pumping sound. I don't think these have anything to do with it but thought I'd mention it.
Ford F-150 (2004-2008) :: 2007 - Idles Rough And Stalls Occur Often When Start
I have a 2007 Ford F-150 5.4l v8...
Codes
P0012 int cam position timing over ret bank 1
P0022 int cam position timing over ret bank 2
P0300 random Missfire detected
P0316 engine misfire detected on start up
P0340 cam position sensor curcuit fault
P0345 cmp sensor a circuit problem bank 2
Starts rough, idles rough and stalls occur often when start, after it runs for 5 minutes and sometimes dint starts at all. I replaced spark plugs, coils, cam shaft sensors and had oil changes done and. No effect.
Prius (Gen 3) :: Noise Near Shifter Knob Occur Only At Freeway Speeds
I have a 2010 Prius no frills model with 5500 miles on it. I've started hearing a noise that sounds like loud burst of radio static. I hear it with the radio off or on. It's very intermittent, but seems to occur only at freeway speeds. Seems to be coming from underneath the shifter or underneath the dash in the same area.
View 2 RepliesPrius (2004-09) :: Humming Sound Occur When AC Turns On Or Speed Changes
When my AC turns on or changes speed - a humming sound occurs. It only lasts for about 1 - 2 seconds.
Is this normal
It sounds similar (higher pitched, but not as loud) to the humming you hear when you turn the vehicle off.
Santa FE SM (2001-06) :: 2004 3.5L - Howling / Whining Occur Occasionally Once Engine Is Warm
2004 3.5L Santa Fe ... My vehicle has about 156k and has a new problem. Occasionally, there is a howling / whining that seems to occur occasionally once the engine is warm. When this happens, the directional can light but will not blink. Same for the hazard light.
Replaced the alternator only about 2 months ago, Checked the p/s pump and it is good and no fluid loss from the reservoir. Been a great vehicle with only a minimal of issues since new. The first time this happened, the car had been on a 15 mile run. It sat for about 20 min afterward when I returned home. After re-starting it to run another errand, the whining / howling began. This lasted about a mile and went away about 2 blocks from my house on my return.
Prius (2004-09) :: 2007 - Engine Started Making A Clicking Noise
The other night I was going up the mountain and while going it started making a clicking noise..probably from no oil..We had been told from the dealership there was a small leak but nothing to worry about at the moment.We tested it and it wasn't leaking visibly but I guess with it getting cold out the hole got bigger and we didn't notice so all the oil leaked out as we were powering the lil car through the mountains..Needless to say on the cruise down it started shaking i saw some sparks and I think the rod went through my engine block and we broke down. It's completely dead. The car has right around 200,000 miles on it and has always been very well taken care of.I just traded my dad the car about 7 months ago for my 4-runner cause of gas prices..I moved across the country and of course have had NOTHING BUT PROBLEMS since day one.
View 8 RepliesPrius (2004-09) :: 2007 - Right Rear Tail Light Keeps Burning Out / Sudden Acceleration?
We have a 2007 Prius and have been very happy with it overall. The right rear tail light keeps burning out and we keep taking it back to the local Toyota dealer for replacement, but they have been very good about it. Though an annoyance, if that was the only problem we had I would not be here right now typing this.
Today my wife was driving and came to an intersection at a red light to make a right-hand turn. She braked coming into the turn and as she made the turn. What happened next scared her and is very concerning to us -
Ford F-150 (2004-2008) :: Engine Noise During Acceleration
I noticed the problem today when I was driving to the store. I was going around 60 and went to pass a car. As soon as I hit the gas there is a popping noise coming from the engine compartment and it had no power. It only does it between 50-65 mph.
View 1 RepliesFord F-150 (2004-2008) :: Engine Noise Under Mild Acceleration
I have a 2005 F150, 5.4 triton. I bought the truck used and it came with an Edge tuner. It's lifted with 35's.
Under mild acceleration I get a psst-psst-psst-psst-psst-psst type noise. Sounds almost like air... It only happens in drive when you get on the gas and put a load on the engine but not always. It doesn't seem to happen if you mash the pedal...
I can't seem to replicate this sound in the driveway. I've never heard this sound before.
Prius (2004-09) :: Metallic Rattling Noise On Acceleration
While driving through a tunnel today I noticed a metallic rattling noise upon acceleration. It goes away immediately when I let me foot off the gas and when I park the car and rev the engine the sound does not occur.
A few days ago, I had to rapidly accelerate and it felt as though I lost power for a split second. I am not sure if these are related, but I am hoping its not some sort of transmission issue (unless that is covered under the hybrid warranty. What was the diagnosis?
Prius C :: Acceleration From Stop With Electric Engine / Clicking Noise
My Prius C II is at a little over 6,000 miles. I've noticed when I'm accelerating from a stop using the electric engine, that at around 11-15mph I hear a clicking noise coming from the left hand (driver) side of the vehicle.
To hear the sound my windows have to be down and my stereo not playing.
Is this clicking sound while accelerating normal? I know there's a clicking sound that happens when I start my car and when my car sits after parking for a second but this clicking noise sounds like its coming from the front left hand side... not inside the cabin.
Prius (2004-09) :: Engine Turning On At Low Speed / Acceleration
I have noticed that recently my engine seems to be coming on when I accelerate from a stand still even with very slow acceleration.
For example today: battery over 50%, foot off break and onto gas very gentally, 0 to 10 in about 4 seconds at about 8 mph I feel the engine kick in.
Over the last few days it has seemed like the engine has been running a lot in town or when moving slowly in heavy traffic.
If I press the ev button I can accelerate quiete aggressively before the engine will start.
Prius (2004-09) :: Engine Misfire On High Acceleration?
Motor started to misfire while out on grocery run. scanner said mifire on #1 so I bought a coil and plug. car ran well for a day then same thing on # 2.. repeat.. then # 3 repeat so did #4.
Now it did it again on #3. I switched the coil #2 and #3 to see if scanner would show if it followed the new #3 coil but so far no code. The misfire is on light acceleration, push down hard and it does not miss. Today I will try some fuel injector cleaner.. Is this the trail I should be following ?
Prius (2004-09) :: 2008 - High Pitched Woo-woo Noise During Acceleration
I took my 2008, 56k in for a new battery after my car sat outside in negative degree temps for a few days. After doing that repair, the dealer recommended a new serpentine belt. Ever since that service appointment, the car is making a high-pitched "woo-wooo" noise during acceleration. It's definitely a noise I've never heard before. I took it back to the dealer two days later; he had the service guy drive it and they both claim the noise is normal and just due to the cold. Is it the belt? Is it the cold? Am I losing my mind?
View 3 RepliesPrius (2010-12) :: Slightly Shaking Engine - Rattling Noise On Acceleration?
Slightly shaking engine and rattling noise on acceleration,it happens when the car is hot and especially when the battery level is very low ,I guess is when as more load . If I accelerate and keep it steady at 20mph I can feel a constant vibration but goes away once accelerating more....like if you're driving on a rippled surface ....that is only when engine is on , doesn't happen on electric only.
The noise it sound like a tapping coming from the engine when slowly accelerating from 0 that goes away as soon I give more gas ,is annoying wile in the traffic.? Can the sparks plugs be the problem?they been changed 120k ago.....,I cleaned the egv pipe but problem still there. Like I said is only when the engine is up to running temperature.
Prius (2004-09) :: Odd Noise In Driver Side Door During Acceleration / Braking
2004 Prius.... About a year ago I heard a noise in the driver's side door. It sounded basically like something was scratching against the plastic, but I'd only hear the noise during acceleration/braking, for maybe a half of a second. That was for about a week, but then it went away and I didn't think about it anymore.
Then, a little while ago, I was in an accident where a pedestrian ran into the road in front of me. He hit the driver's side, and there was some damage. Bumper, hood, front light replaced. Suddenly, I'm hearing the noise again, and it's not going away.
Really, what it sounds like to me is as if some piece of something is loose inside the door and moving back and forth whenever I accelerate or break.
Prius (2004-09) :: 2008 - Red Triangle / Check Engine And VSC Lights On - Low Acceleration
Some days ago while I was driving, the check engine, red triangle and vsc lights came on and immediately my car slowed down. It would take longer to accelerate and every once in a while upon getting to a stop sign, it would take long to get to 5 from 0. could this be my hybrid battery going out? My regular scanner can't pull up any codes on a prius.
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