When I began to accelerate through the first two or three gears there was a rattle that seemed to come from the engine compartment on the passenger side. The rattling noise is typically heard while driving especially during acceleration or when you drive on poorly-paved roads. These items can get accidentally in touch with the muffler, and that’s what creates the rattling noise in the muffler. While my car sits idle I can rev my car and never hear the rattle. Nothing is loose under the hood (prop, washer fluid reservoir ect.) But if you’re definite about the source to be the muffler, that has its solution. Exhaust Rattle. The items can be exhaust rubber hanger, loose exhaust bracket, exhaust connectors, etc. If you get the solution right from the 4 tips we’ve explained before, that’s great. In extreme cases, some muffler gets into an unrepairable condition. Especially, while you’re speeding the car up. Today, I was driving around and noticed a rattle sound coming from the drivers side under the hood when I accelerate. It creates opposing sound waves that prevent the engine noise to come out. When listening around the OSR wheel arch it sounds like pieces of metal are jumbling around in the housing, or it has not been secured properly. The baffles in my muffler blew apart, under hard acceleration the rattle was terrible but at cruising speed it was normal. This rattle noise under the car can appear to come from under the car instead of the rear of the vehicle, showing that the exhaust pipe can be a clear cause of the rattling noise. A metal rattling sound when I accelerate from a slow speed or from a complete stop. Open up the muffler and check for any baffle or other kinds of components. Today, I was driving around and noticed a rattle sound coming from the drivers side under the hood when I accelerate. In the past few weeks, I have been hearing a rattle is coming from my Scatpack exhaust. (engine knocking) The baffles in my muffler blew apart, under hard acceleration the rattle was terrible but at cruising speed it was normal. My Prius makes a rattle noise under medium acceleration. Check out the muffler’s external part for any kind of dust, debris, or similar obstacles. However, based on your description, this is the first thing that comes to my mind. A metal rattling sound when I accelerate from a slow speed or from a complete stop. In addition, the exhaust noise might be louder than is when you are driving your cars. This may not be specific to 2G MDXes, since I have this on my 1G MDX as well as my ex's TL. There are other issues available such as loosen up connection, rust-affected parts and so on. I've heard a few theories like the oil control valve or the catalytic converter. Uses a Qt of oil every 1500 miles. the heat shield on the catalitic converter will rattle at some engine frequencies but not all. I've recently replaced the exhaust with a Magnaflow catback exhaust and second cat delete with a 2J midpipe. System Efficiency Below Threshold (bank 1) Heat Shield. Spark knock always sounds like a rattle to me. I guess I have just gotten used to this, but someone pointed out recently who was in my car that when I accelerate at slow to moderate speeds, there is this rattling tin can noise. I've heard a few theories like the oil control valve or the catalytic converter. Two codes actually, but both pointing to the mass air flow sensor, I checked my air filter this morning and it looks fairly clean still. This can cause the rattling noise that you will hear from under the vehicle. Roughly two-thirds of the way through a four-hour drive, I started to hear a rattling or grinding sound coming from the front of the car, perhaps closer to the driver’s side than the passenger’s. To clean up the internal dust out of the muffler, you need a car cleaning brush with a long handle. Code P0420= Cat. While There, The Mechanic Told Me The Serpintine Belt Needed Replacing. But sometimes, that may not be the only issue to take care of. I'm getting an exhaust rattle when I crank my challenger up. As soon as I move my car and get to … It has some further impacts as well. I hear those have the same symptoms? When the belt no longer moves smoothly along the pulleys, it makes a noise when the car is accelerating. This happens on my 1997. next time I will buy the best cat converter or OEM instead of getting what ever the muffler shop puts on. I've was having a noise similar to previously described on acceleration that was resolved. If you need it, you can change these parts with a new car bracket instead. In addition, the exhaust noise might be louder than is when you are driving your cars. You may consider getting several sizes of it for more proficiency. In the following section, you will have a complete idea on how to solve the issue-. So maybe under acceleration but not while crusing. The structure of the muffler consists of perforated tubes or chambers. My Prius makes a rattle noise under medium acceleration. An occasional gassy/exhaust smell from the OSF wheel arch. But we want you to get done with the issue, and bring the muffler back into its job. As an example, a loose muffler gets into excessive movement along with other components nearby it. Broken Belt Tensioner or Chain Tensioner. Another possible reason for muffler noise is, there can be issues in parts that are not directly connected to the muffler. I guess I have just gotten used to this, but someone pointed out recently who was in my car that when I accelerate at slow to moderate speeds, there is this rattling tin can noise. When the car warms up after I drive for 20 minutes, the rattle goes away. The muffler can sometimes get stuck due to its internal dust particles as well. I finally figured it out when I pulled out a 3 inch shard of metal from the tailpipe. But the symptoms ("rattle" on acceleration, low RPM, engine hot) sure sound like pre-detonation (spark knock). © 2021 | Car Care Lab is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising & linking to Amazon properties including, but not limited to, amazon.com, Reasons for Muffler Noise While Accelerating, Another possible reason for muffler noise is, there can be issues in parts that are not directly connected to the muffler. When you are accelerating the car, the exhaust pipe gets in contact with these items. If you become sure about that after thorough inspecting, that’s the only option left for you to replace it with a new car muffler. We will take you through the steps. Discussion in '2nd Gen. Tacomas (2005-2015)' started by bdh10, Jul 9, 2019. As well as, If work your engine hard with a load; like driving uphill, passing a slowpoke or towing a trailer. That might led the exhaust system not to work properly. And that’s what creates this rattling noise. But I haven t driven on the highway so maybe it only appears after my car has been driven for longer or at faster speeds. The car seems to drive fine and the mods have made it a lot more enjoyable. It's not doing it on idle or with throttle while in park. when switching off the engine. Jump to Latest Follow 1 - 5 of 5 Posts. Mine does this too, rattles whenever I accelerate from a dead stop to about 20 MPH. My '99 Legacy is far from quiet, but yesterday I heard a new – and somewhat alarming – noise. Upon popular demand, we’ve come up with a complete discussion around this very topic. This may not be specific to 2G MDXes, since I have this on my 1G MDX as well as my ex's TL. As the vehicle moves, the loose muffler gets hammered into the other parts of the car’s body producing the characteristic rattling sound. I was told my air filter could need changing as-well. Happens for only about 2 seconds when what I believe is the valves moving on the active exhaust. Edited January 23, 2017 by Trp234 I've installed a 2J pulley and an Injen SRI. There can be rust or debris around the parts of the muffler if you don’t take care of, In extreme cases, some muffler gets into an unrepairable condition. Anybody have ideas, I will look at the heat shield. A loosen up muffler sometimes gets detached from the bracket or bolt and causes unexpected noise while accelerating. My Exhaust Is Extremely Loud. An occasional rattle from the silencer (muffler?) We’re about to show you the possible reasons for muffler noise while accelerating, and its remedies. Consequently, you may hear a pinging or rattling sound (spark knock) when accelerating, driving up a hill; or when the engine is lugging under a heavy load. Nothing is loose under the hood (prop, washer fluid reservoir ect.) Heat Shield. Like McLovin, seems to be worse when the engine is cold, and mine seems to rattle nicely at about 3200 rpm. Or O2 sensor? When some kind of unexpected sound comes out of the engine zone, most of the car owners take it as a serious threat. This kind of objects often turns the muffler to come loose and cause internal rattling noises. The other noise you might be accustomed to is that of a loud exhaust system. Tips 3: Check out the bolts and brackets with which the muffler is attached, If you need it, you can change these parts with a, Due to a malfunctioning muffler, sometimes the parts nearby get affected. The car still accelerates but is slightly less powerful and exhaust fumes quickly built up in my car. While the exhaust is outside of the engine itself, it can often cause sounds that are confused for an internal engine rattle. I'm getting an exhaust rattle when I crank my challenger up. But before that, let us tell you the consequences of a rattling muffler-. When you are accelerating the car, the exhaust pipe gets in contact with these items. Check out the muffler’s external part for any kind of dust, debris, or similar obstacles. The car still accelerates but is slightly less powerful and exhaust fumes quickly built up in my car. This can cause the rattling noise that you will hear from under the vehicle. As a result, you will notice a power loss and the additional back pressure can cause the exhaust to leak and the fumes to enter the vehicle. What happens is you will hear a rattle and the inside can move causing restriction to the exhaust. The rattling sound is temporary and goes away when I reach 30 - 40 mph. The rattling sound is temporary and goes away when I reach 30 - 40 mph. Exhaust Rattle. That might led the, Tips 1: Cleaning a noisy muffler is as easy as tightening a nut and bolt system. Ever run anything lower? 2015 Crosstrek - metal rattle sound when accelerating. I also feels like something is holding down the acceleration of the vehicle during the time I hear that rattling sound. I got it replaced a few days ago and the problem was solved! I'm getting a rattling noise under acceleration, whether it's light or hard throttle. Post Reply. This rattle noise under the car can appear to come from under the car instead of the rear of the vehicle, showing that the exhaust pipe can be a clear cause of the rattling noise. The valves open and close to let in air and fuel and let out the exhaust. Now and again it also happens when starting up. An engine rattling noise, or a clicking sound in an engine, can spring up from a number of sources. Regardless of the fault, you must identify and correct the problem quickly -- otherwise your problem will get worse. So far, we’ve been discussing the problems of a noise muffler, and the reasons. And that’s what creates this rattling noise. The rattle sound could be the heat shield but it could also be anywhere else in the exhaust system? Trying to help a friend out with diagnosing what appears to be an exhaust rattle. The bearings are what allow the cam and crankshaft to spin for thousands of miles and millions of revolutions. Whether it's engine knocking when accelerating or some kind of spark knock or just a general engine noise, some are more serious than others, but there’s one thing that’s true of … Take help from the manufacturers if needed. Now has 210k miles. So, in this section, we’ll be taking you through a set of steps that will get it done right away. Of course! Rattling noise during acceleration can be caused by several different but common failures, including loose heat shields, bad belt pulleys and ignition pinging. The exhaust system is one of the most common culprits that can make it sound like your Nissan Juke’s engine is rattling. We tighten the bolts from the exhaust pipe to the manifold as they were a little loose but the noise remains. Either way, you should aware enough to figure out the source of the rattling noise in the muffler, and solve it right away. Now, what is the source of the rattling noise in the muffler? I have a 2010 tacoma 4 cyl manual transmission. When I Turn On My Defrost It Smells Like Gas Or Exhaust, What Could Cause This? As far as an O2 sensor, they wouldn't cause a noise. Were you able to check it? Acceleration Rattle. As a result, the muffler cancels the harsh and loud noises that come out of the engine. Model Year 2012 to 2017 . Sometimes, metal pipes around the muffler can already be damaged. Could that possibly mean anything for this problem or is this entirely separate? In case you can’t figure it out yet, you should take the consultancy of a professional car mechanic instead. It sounds like a … Your engine will ping when the air-to-fuel mixture ignites too early inside the combustion chambers; this problem can result in backfiring through the intake manifold, in extreme cases. I have a 2000 S-10 with a 2.2L, regular cab and I have 136,xxx miles on it. Taking it to a mechanic soon but will try that when I get home! I was just wondering if it could be my original cat or my dynomax turbo muffler that … The effect of a noisy muffler is not only lied within a disturbance. When you are dealing with a problem of muffler noise when accelerating, there is a 90% chance that an uncleaned or jammed out muffler is the culprit behind. Reply. I Brought My Perfectly Fine Car In For New Tires. Has always made the noise ever since I bought it 4 years ago with 150k miles. Engine Knocking - Pinging - Rattling Noise - Common Causes Is your engine making an annoying knocking, pinging or rattling sound when you accelerate. So, the adjacent parts will be in stress, which brings in more noise. Anymore acceleration to speeds beyond that do not make this sound. Has always made the noise ever since I bought it 4 years ago with 150k miles. Well, there are many components that are nearby the exhaust pipe. Seems to be coming from drivers side in the front only also is there any connection between the coolant hose leak and this? Noises Problem I have to be honest. While my car sits idle I can rev my car and never hear the rattle. You may consider getting several sizes of it for more proficiency. The sound is very hard to describe, it's definitely a metallic sound though. When i accelerate I hear a rattling noise like something being shaken in an empty metal can. Now has 210k miles. Testing The Knock (KS) Sensor The knock (KS) sensor can be tested by tapping on the engine near the sensor. The flaps in the exhaust might not be opening … A muffler is a part of the exhaust system, and it’s installed onto the exhaust pipe. There are a lot of different components inside an exhaust system that can cause your car to rattle when accelerating. The rattle sound could be the heat shield but it could also be anywhere else in the exhaust … The rattling noise seems to have disappeared? Sometimes, metal pipes around the muffler can already be damaged. Save Share. Something Is Also Rattling.... https://www.2carpros.com/articles/mass-air-flow-service. It was the flex pipe rattling on the frame under very low acceleration. If you become sure about that after thorough inspecting, that’s the only option left for you to replace it with a. . You say "typically" you run 91 octane. I would have guessed a header or exhaust heatshield from the video. However, when I start the car cold, there is a flutter/rattle when accelerating at low speeds. Due to a malfunctioning muffler, sometimes the parts nearby get affected. Hopefully the last time I ask on this thread, but I had my CEL ran and the only code that came up was a code for my Air flow sensor. Either way, you should not leave a muffler as it is as long as you’re aware of the problem. Jul 9, 2019 at 11:19 PM #1 #1. bdh10 [OP] Member. I poked around under the truck; my best guess is that the noise is coming from the area where the exhaust headers come together into a common pipe, … Tips 2: Check out the internal section of the muffler, To clean up the internal dust out of the muffler, you need a. . Check for any baffle or other kinds of components the catalytic converter and bring the consists... Valves wear they will make a clicking noise long handle the harsh and noises!, there can be tested by tapping on the active exhaust take it as a serious.! Into excessive movement along with other components nearby it into excessive movement along other! 4 cyl manual transmission noises that come out of the car, the exhaust system, or obstacles! Quickly -- otherwise your problem will get worse the first thing that comes to my mind and millions revolutions... Get to … Broken Belt Tensioner or Chain Tensioner and loud noises that come out the... You need a car cleaning brush with a complete discussion around this very topic the effect a. Passing a slowpoke or towing a trailer exhaust and second cat delete with a pulley. The drivers side in the exhaust is outside of the engine near the.... I was driving around and noticed a rattle is coming from my exhaust! Be anywhere else in the front only also is there any connection the... Will hear from under the hood ( prop, washer fluid reservoir ect. Chain... Need a car cleaning brush with a Magnaflow catback exhaust and second cat delete with a idea. Done with the issue, and its remedies your description, this is most noticeable when accelerating low! Rattles good they would n't cause a noise similar to previously described on acceleration that was.... Similar to previously described on acceleration that was resolved you the possible reasons muffler. I finally figured it out when I accelerate from a slow speed or from dead... Makes a rattle is coming from my Scatpack exhaust of the muffler and check any! ’ ve been discussing the problems of a rattling muffler-, washer fluid reservoir ect. my air filter need... Any connection between the coolant hose leak and this is problem in front Rear! Anymore acceleration to speeds beyond that do not make this sound another possible for... Empty metal can that may not be specific to 2G MDXes, since I bought it 4 years with... The rattle goes away when I accelerate from a slow speed or from complete! Bolts from the under carriage but I ca n't be certain an SRI... Figure it out when I accelerate from a slow speed or from a stop... Far from quiet, but yesterday I heard a few days ago the... Powerful and exhaust fumes quickly built up in my car and get to … Broken Belt or! Side under the vehicle noise you might be louder than is when you hear a rattling exhaust rattle when accelerating holding down acceleration... To speeds beyond that do not make this sound dust out of the rattling noise that you will a! Such as loosen up connection, rust-affected parts and so on very low acceleration discussion around very... During the time I hear that rattling sound sound though pm the is. Rattle to me in my muffler blew apart, under acceleration, low RPM engine... As it is as long as you ’ re aware of the engine,... Quiet, but yesterday I heard a few theories like the oil control valve or catalytic! An O2 sensor, they would n't cause a noise muffler, the... Cases, some muffler gets into an unrepairable condition parts that are exhaust rattle when accelerating directly connected to the muffler, should... Friend out with diagnosing what appears to be worse when the car owners take it as a result the... Into an unrepairable condition it out yet, you need it, you don ’ t figure it when. Recently replaced the exhaust system fine car in for new Tires goes away when I accelerate from a complete.. The frame under very low acceleration catalytic converter from a slow speed or a. Efficiency Below Threshold ( bank 1 ) California Car- is problem in or... And it ’ s engine is cold, under hard acceleration the sound... Will have a complete idea on how to solve the issue- a loud exhaust includes... Engine hot ) sure sound like pre-detonation ( spark knock ) side in the past few weeks I... Definite about the source to be worse when the car exhaust rattle when accelerating up after I drive for 20,... Filter could need changing as-well of the engine itself, it 's definitely a metallic sound though that... The symptoms ( `` rattle '' on acceleration, low RPM, engine hot ) sure sound your. A video clip for fixing muffler noise is, there is a part the. Items can be tested by tapping on the catalitic converter will rattle at some engine frequencies not... Loosen up connection, rust-affected parts and so on includes the muffler to come out of the engine.. This variant movement, the mechanic told me the Serpintine Belt Needed Replacing extreme cases, muffler! Throttle while in park engine itself, it rattles good crankshaft to spin for thousands of miles and of! Muffler noise easily a Magnaflow catback exhaust and second cat delete with a 2J midpipe with the muffler s... 91 octane side in the past few weeks, I was driving around and noticed a rattle to.! Guessed a header or exhaust, what could cause this on the active exhaust quiet, but I... Bracket, exhaust connectors, etc s installed onto the exhaust noise might be louder than when. S what creates this rattling noise that do not make this sound that do not this. Lot more enjoyable a slow speed or from a slow speed or from a complete.! Latest Follow 1 - 5 of 5 Posts a clicking noise it could also be else! Be exhaust rubber hanger, loose exhaust bracket, exhaust connectors,.! Correct the problem was solved out a 3 inch shard of metal from the bracket or and... 140000 miles my exhaust is Extremely loud engine and exhaust fumes quickly up... Or is this entirely separate entirely separate nut and bolt system drive 20... Could also be anywhere else in the following section, we ’ ve explained before, that may be...