Prius (2004-09) :: Exhaust Noise Has Been Getting Louder
Jul 24, 2014
So recently (since Thursday morning last week) I noticed the exhaust noise of my prius has been louder. Today I experimented a bit and I'm pretty sure it's exhaust related. The car is pretty loud if there is any load on the engine, although still mostly quiet if it's idling. There are no errors presenting and mileage is still great.
Otherwise, it's loud and resonates at a few different rpm points, and I found that when the engine spins under breaking (foot-off coasting over 42mph or in B mode) it also makes noticeable exhaust noise of the same type.
I'm guessing the exhaust is leaking (the sound seems to be coming almost from the left rear seat area? Behind me when I'm driving at least).
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Ok, as promised I made a clip of my 2011 Ecoboost towing my 5-6K trailer with a 3" cat back MBRP exhaust. I gained over 2 mpg with this exhaust (MBRP) and intake (aFe) while towing. So far while not towing it only seems to have given roughly a 1 mpg increase over stock. I can barely hear the exhaust at highway speeds after the truck shifts into 5th and 6th gear. The wind noise is literally louder than the exhaust at 55 mph!
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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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Noticed a louder sound to my exhaust. Cuts out when ice shuts off. Haven't got a good look at the whole exhaust system from underneath but did see water drip out from the engine side of the resonator when the car was warming up. The sound is coming from about midpoint between the taiI pipe and the engine. I suspect the weld at the resonator junction is breaking. Is this common? 2008, Canada, 130000 km.
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My F150 exhaust seems rather quiet when I first start it up, but after it gets warmed up good, the exhaust is much louder (which I like). I started wondering if I had a crack up front that widened out when it got hot, so looked under it when I got home today with it hot and still idling, but didn't see any cracks. Also I did not hear any noise like a leak. All sound was coming from the side exit pipe. So... what is the phenomenon that would cause this?
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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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My car used to be quit as a mouse, but over the last couple of years it has been getting louder. I feel it is something with muffler....When i look under I don't see any holes...I have 145,000 miles on it...Do these models, as they age start sounding louder.
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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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I recently flashed my car and not to happy about it. For me the car feels a little different than stock. My exhaust is louder and when I start the car now is doesn't start from high revs down to low anymore. I think I'm going to take it back and remove the software from the car. I personally don't like the feel as to stock.
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So I acquired a 2003 1.8t GTi a little bit ago and i'm loving it, but I want it to be louder and more aggressive. With that being said I've already searched the forums but could not find anything for my specific case. I bought the car with a 3 inch downpipe and Borla muffler installed so I would like to know what way I can modify the exhaust to be louder while keeping these components in tact!
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My 06 Prius seems to be a little louder than usual when the motor is running. What could be going on? Just had the hybrid battery, water pump and belt replaced, but it still seems to be making the same noise.
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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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I currently have dual exhausts on my 2002 F150 and that's all I have besides stock for the exhaust system. How can I make it louder without getting rid of the duals?
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2005 Prius, 50K. Newly purchased two weeks ago. Last night, driving into my garage with the ICE off, noticed a noticeable electric or electronic-sounding hum from the engine compartment. With the hood up and looking toward the engine from the front of the car, noise comes from the right side of the engine compartment, to the right of the inverter cover.
The noise, a loud hum, appears when pressing the Power button and the brake pedal. It also appears when pressing the Power button twice without pressing the brake pedal. When starting up the car, the hum lowers in pitch significantly (though not in volume) as soon as the Park button is pressed.
When I bought the car, I brought it in to the dealership for a complete checkup. They replaced the inverter coolant pump under the recall notice. Don't know if that's significant. I opened the coolant reservoir cap last night with the motor on, and noticed movement inside, so it appears to be working fine.
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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 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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Is there any way to make the exhaust quieter? I'm going for somewhat of a stealthy look, and quiet exhaust. I have a 2004 v6 glx sedan manual transmission, all stock.
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My '05 Lexus RX330 has developed a vibration and rattling noise, that I believe comes from the exhaust system. Looking for info on trouble shooting or quick repair?
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A little background on my Prius, I have an 08 that has around 179k miles on it and have never had any major mechanical problem. I have always kept up with routine maintenance. I use Synthetic oil and change it about every 6500 miles.
So, two weeks ago, it was time to change the spark plugs again. Carefully, I took out the old spark plugs and installed the new spark plugs. On the second spark plug wire and spark plug, I noticed a little bit of oil, so I wiped it off with a shop towel, installed the new plug, and kept going.
Interestingly enough, now I have a problem where when I first start my car (and only when I first start it) and I just have the interior fan running (not with the A/C on) I get some serious extreme exhaust fumes through my A/C vents and that wasn't happening before I changed the spark plugs.
Now my first thought was, "Shoot, what the hell did I do to my car?!"
Here's the weird part, once the ICE has warmed up and shut off for regular "ready" mode, I don't smell it ever again even if the ICE activates as I'm driving. Note that at this point, I haven't made any changes to what fan speed or setting the climate is on.
As soon as I turn my car back off, then back on again by pushing the power button, out comes the awful exhaust fumes again.
So, here's where the testing stage comes into play. I have tried everything I can think of. Yesterday, my father take the air box off and we made sure all of the hoses were attached and the recirculation hose didn't have a clamp. We replaced the clamp and resecured all of the hoses in the engine thinking that there might of been a loose hose with the exhaust recirculation.
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Ok, probably about 1/3 times i start my 96 f150 4.9 with true duals, the left pipe has a higher pitched howling noise, its a steady tone whether I rev the truck up or not it just gets louder. It will do it for about 6 seconds and then stop. The truck doesn't run badly because of it, but i took her to autozone to get her scanned and they said that the oxygen sensor on the first manifold bank has a slow response on startup. Is that what causes this strange noise, I don't even know how it would make it, it sounds much different from the engine. The right pipe doesn't do anything.
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My 2010 GTI seems loud with the A/C on. I don't remember it being this loud before. It's been nearly 30 C / 85 F most of this week.
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