Prius (2004-09) :: Engine Sounding Louder Than Normal If Accelerating At Quick Speed
Jul 12, 2011
I took my car to the car wash and they seemed to take longer to vacuum/wash it and while driving it away, I noticed something was off. It seems like the engine is louder than normal. Before when starting the car, it would take 30 seconds to a minute before the battery/engine would come on. Then while accelerating to about 25-35 mph, then the engine would come into gear. When going on the freeway, if accelerating at a quick speed it would sound really loud. Now, it seems like instead of silent, quiet, a little louder, louder and loudest - it's moved to the next level. When starting the car, the engine starts right away and when driving away (at less than 25 mph), the engine sound like I am on the freeway and when I'm on the freeway it sound like I'm trying to gun the engine. I don't know what it could be.
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I wish I knew how to describe it better
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Leaking exhaust manifold? The truck has a much louder than normal "knock" when accelerating. At first I thought and had some bad fuel in the tank. I eliminated that with a full take of good fuel and some STP but the "knocking" continued. Then I thought that perhaps it wasn't firing on all cylinders but it felt like it had full power. I took it to my mechanic and he said it as a exhaust manifold leak. He said that he has never replaced the exhaust manifold but that it was a "nightmare" and expensive. He also said that it's not a safety issue but on the long run the leak would cause the truck not to pass its emission test. He said the problem was with rusted bolts that would be difficult to remove.
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Car makes louder than normal regenerative braking (Hybrid Sound). Seems normal when braking at high speeds... then when the speed drops below 30mph the sound is noticeable louder. See Video for example sounds while braking (17, 35 and 50 seconds into the video are most notable).
[URL] ....
Car drives normal other than the regenerative braking sound... Car was involved in a front end accident. Damages were repaired and seem minor. Front Bumper cover, hood, Radiator, Fans, RF Fender. Front cross member and other frame areas look untouched.
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I have an 03 GTI, and recently the engine has been very loud at speeds over 25mph. There isn't any rattling, ticking or chugging sounds. It just sounds like my rpm is at 7000, when it's actually 2000.
I'll try to upload a video tonight of driving around.
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I have a 2000 Saturn sl2 (automatic 85,000 miles) and recently, I can feel the momentum of the car stop for a split second. The hesitation isn't occurring when the transmission is shifting between gears but, when I'm just at a normal speed or accelerating. The fluid is new and at the right level and there's no change in the RPMs (it doesn't rev up or drop like I would expect) and no weird noises.
This is my fourth Saturn SL and I love em but, I have a feeling that this car has had a more interesting life that the carfax printout indicated. Is carfax reliable?
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over the past two weeks my 2011 GTI seems to have gotten a bit louder and has a low frequency rumble when on the lower end of the gears (DSG). Any thoughts on this? From the exterior the car doesnt seem louder to me at all. I have a stage 1 APR and everything else stock
Maybe I am going nuts but it is bugging me!
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Its peak summer here and temperatures are around 50c. Recently I am experiencing a strange AC behavior! While driving, AC is blowing very cold air but while stationary air get little less cold and it feels sweaty... Also accelerating car makes AC more cold than cruising on normal speed...
I am wondering what it could be.... I had golf IV and never experienced it even it even parked under 50c summer afternoon.... Two weeks back, they have replaced my AC compressor valve... It could be a fan?
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2010 Ford Focus. My fiancee noticed that when accelerating, the car has an electrical sounding whine coming from the engine. It only occurs when we're accelerating and pitches a bit higher when we're turning
We have until Thursday to return the return the car if their is an issue.
I've attached a video of her revving the engine.
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I recently noticed louder than normal road noise coming from he front end of my SUV, which is right at 150K miles. I thought it was bad tires; both front ones had uneven wear. Got new ones and the noise is still there, loudest at 35-45 mph. The tire guys said I need new tie rod ends. From what little I know about those, they don't make the kind of noise I'm getting, but what do I know. I do know they are safety hazard and plan to get them fixed pronto. But will that fix the noise? I had the left side wheel bearings replaced last year, but this sound is not the same as this. Much less pronounced, but still fairly bothersome.
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2011 SE leased in December 2010. I Now have 14,000 miles and my trans has started to slip.
First slip was yesterday on a a fully warmed motor while I was accelerating at a normal rate of speed. I am guessing the car was in 2nd gear (25mph) and the rpms shot all the way up to redline. I let off the gas, coasted for a few seconds and the trans engaged the gear and I kept driving. No cel
Today the same thing happened under the same conditions but this time when the trans re-engaged the gear, the car jerked forward pretty violently.
About 15 minutes later this happened again but at highway speeds (65mph) while cruising. Again, violent jerk and a thump when the trans caught the gear.
After all this I have no CEL. I know if I bring the truck to the dealer they are going to give me the old, "we cant reproduce the problem." Once the trans starts to slip like this the damage has already been done and its just a matter of time before I am stranded on the the side of the road.
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Vitals - 2004 Ford 350 Diesel 6.0L, Approx 80k miles. Purchased a year ago, driven approx 8k over the year, not a daily driver but typically taken on at least two 45 mile drives (highway, country, and urban roads) once a week but often more and also used for long trips. Truck has had regular maintenance and no issues.
Symptoms: After loading mulch (by hand so it wasn't much weight), truck drove fine for 25 miles. After restart (got coffee and donuts), truck was fine through town but accelerating from 25mph to 55mph engine noise was louder and sharper. noise persisted when engine was above approx 1500rpms. After a period of time driving over 65mph, noise stopped and engine behaved normally. Even with the noise, engine never seemed to lose power.
Since that time(one week), about 50% of starts have resulted in the noise with no clear pattern of hot vs cold starts. Even after starts where the noise occurs, if the engine is pushed to 70mph sometimes the noise stops and it not present for the rest of the drive even at those lower rpms where the noise was previously present. I don't know if the noise would happen in park with a revved engine without going into drive but if I shift to neutral while the noise is occurring, it persists. Noise is definitely not related to vehicle speed but rather engine speed because going downhill if gas is taken off, the noise is not present regardless of speed.
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I have an 04 Pontiac (wifes car) as you start driving you hear a humming noise that starts at about 20mph and gets louder with speed at high speeds it just stay's steady, changes when changing lanes and gets quieter as you slow down, I know its not the engine or transmission as I can rev the engine and only when the car speeds up the sound changes (louder). I've been seeing similar post and its either CV joint or bad bearings but need more of a defined answer from a mechanic who recognizes this situation. Also the sound does make a little vibration felt through the steering wheel and gas pedal but again changes when steering is turned back and forth which I think means it's somewhere in the drive shaft and axle area or steering system.
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Is it normal for the engine to turn on for about a minute when you first start it? Mine always does it, seems normal, but just wanted to check and also find out why. I assume it has to power a couple electrical things in the car?
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I have a rear wheel bearing type of noise that appears to come from the rear. My vehicle is front wheel drive and has 135K miles.
I checked the rear wheel bearing/hub assys on both sides and they had no play but I changed them anyway. Noise did not change at all. Rear tires have normal wear, no cupping or anything. Noise gets louder with increasing speed up to a point and then remains a constant level.
My next thought is to check the front wheel bearings/cv joints.
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I recently got an oil change at EZ Lube and since then my engine seems to be running a little harder. You can feel it vibrating more than normal while idling and when stopped at a light when it turns off, it REALY turns off like it's choking out and sort of kicks the whole car a bit when it shuts off.
I just switched the air filter just in case as it seem similar to my old car that would die if the carburetor wasn't bringing in enough air, but I'm not as familiar with fuel injected engines. Could it be the fuel filter or other engine issue?
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My daughters 2010 Sonata has a occasional problem that is very disturbing. When she is slowly pulling into a a parking spot or into her garage, the car will make a lurch forward. Just a quick acceleration and then back to normal. So far she hasn't damaged anything but its just a matter of time. She has taken it to a neighborhood independent garage.
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I have a 98 ford explorer just changed the alternator and now its running rough also it sounds louder than normal from the muffler. I am clueless, what the problem can be?
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When I rev the engine it momentarily goes down to below normal idling speed (sometimes it completely shuts off)then goes up to normal idle. I have found that if I press the throttle too hard before it recovers it always shuts off.
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I have a 2003 GMC Envoy with 76000 miles on it. I heard a louder exhaust noise than normal when I start the truck in cold weather. I had it checked and was told that the exhaust system was OK but that the noise was because the motor mounts needed replacing. I have never heard of this before. Before I spend this money I wanted to see what your reply was to this question. Is it common for motor mounts to have to be replaced on this type vehicle with this mileage and age?
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So after doing some troubleshooting and researching in trying to find out on my 87K 2008 Prius Std "Noise in the engine while accelerating", "Approximately 10% reduction in fuel efficiency, due to lack of power from engine" & "Glide seems to be degrading over time", here is what I have observed.
1) When I push the gas when the car is parked the engine does not seem to rev in a stream, it goes up for about 3 seconds then goes down for 1 second, then again goes up and then down and this keeps happening until the gas pedal is kept press. In conventional cars the rev should be streaming continuously and proportionately to the pressure applied on gas pedal. This almost seems like a misfire, but from the drivers seat I do not hear any blasts, I have never tried this before so I don't know if Prius's are suppose to be like this. Also no Alarms on the MFD.
2) After using the 5.25 oz fuel injector cleaner in back to back half tanks I saw the engine regaining power and hence bettering the fuel efficiency. Does that mean I should get a Fuel Injector cleaning done by Toyota?
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