Acceleration Noise

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bchap05

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Can you post the video? Just curious if we are talking about the same thing. Would be cool if I know someone else with the same issue.

Stupid video is too big email wont even let me send. I"ll have to see if I can compress enough. I never thought of the sound this way until I listened to my video, but on the video it basically almost sounds like if you have a dead battery and you turn the key and get the tttttkkkk ttttkkkk tttkkkkkk noise or whatever it is. Its almost like that but much quieter and quick.
 

daveray9

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Stupid video is too big email wont even let me send. I"ll have to see if I can compress enough. I never thought of the sound this way until I listened to my video, but on the video it basically almost sounds like if you have a dead battery and you turn the key and get the tttttkkkk ttttkkkk tttkkkkkk noise or whatever it is. Its almost like that but much quieter and quick.
Ya... thats it. Ya can post it to youtube and share the link so everyone else can hear it. Really the only way to do it.

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bchap05

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Ya... thats it. Ya can post it to youtube and share the link so everyone else can hear it. Really the only way to do it.

Sent from my SM-G960U using Tapatalk

I changed the oil tonight. Hoping that the top off might make a difference. Drive to Lowes and it sounds fine on the way there, try to make the noise no noise. Go in store and come back and it's doing it even louder than normal. So apparently the oil level didn't change anything.

Get home and decide I'm going to duck tape cell phone in the engine bay and try to make it do it. I was getting it to do it a bit, not loud of course since I was trying to film and it always refuses to do it when you want it to. But after reviewing all the footage you can't pick up the noise. Not sure if its not audible in the engine bay or it just wasn't doing it enough to hear.

Going to try again tomorrow to get a good clip, then will youtube it if I get something audible. Or if not at least maybe I'll figure out if its in the engine bay or not.
 

Octane

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So I've brought this up before but I know noise diagnosis is hard over a forum, but it's bugging me again. So quick background. My truck has made this noise since I bought it new. I've told the dealer about it a few times, but never really pushed them on it, and now I'm past bumper to bumper. However the noise is while accelerating so it could be covered in drive train which I still have. It has gotten louder recently I've noticed so that is why I bring it up.

Things it is not:

  • I thought maybe it was a heat shield or my exhaust rattling but it is not. (pretty sure)
  • Its not a tick or lifter type noise, I've had that and had bolts fixed.
  • It's not aftermarket as it did it stock the day I got it new.
  • Don't think its tied to the engine as it wont do it in park or neutral
  • Not MDS as I can kill mds with my Pulsar and it does it either way.


1. It's hard to describe but sort of a metal sound can rattle. Almost like a ping but its not pinging. Not super loud if the music is on I usually don't hear it. If I roll down the window I can hear it but its almost more difficult due to wind and road noise.

2. It doesn't not make the noise when in neutral or park and revving. So therefore it has to be tied to the drive system making the truck move.

3. I can make it do it on command. To make it make the noise I need to be moving (40-50 seems to be easiest) When the truck has down shifted and is in a high gear, if I lug it and barely push the pedal lightly it will rattle rattle rattle as it slowly accelerates. If you push a bit harder it quits or gets hidden behind exhaust noise. It doesn't seem to do it in lower gears. Its not shifting when it does it, it remains in the same gear. More of a lugging noise.

4. The only time besides lugging that I hear it is if I'm way up in the RPM band. So if I'm towing up a hill, or really getting on it and am in the 5k rpm+ range it will do it real quick.

Its never seemed to have caused any issues with the truck. Nobody else seems to have this issue but me, as I 've asked around before. The only way to probably diagnose easily would be to have the truck on something like a dyno where you can get the drive line moving without actually moving so that you can listen and figured out where its coming from.

Any ideas? Torque converter? Transmission? Something fuel line related? Something electronic that happens when you hit the throttle? Like I said hasn't caused issues with the truck its just annoying and makes my truck sound more ghetto.
Have you got dual exhaust?
 
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bchap05

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Got all excited because i read a bunch old threads claiming a similar noise from a clip left on the exhaust. I looked under my truck and I have the clip so was like yesss that's it! But then found my was tacked on both ends so I doubt that is it. Tried to pry it off and snapped my screwdriver so its definitely on. Tempted to cut it with cutting tool because a ton of people in old threads said this made it shut up.

The other threads I saw it wasn't actually tacked down, and they broke it off.

clip.jpg

Anyways I'm finding out that apparently others have it. When I had searched years ago I could never find anything now I'm finding all kinds of threads on it.

This isn't mine but this is the exact noise which apparently nobody has a solution or explanation for:


Seems like even the 5th gen dudes are also complaining about it. Amazing in like 12 years nobody has seemed to figure it out.
 
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GTyankee

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When you explained the conditions under which the noise occurs, i was guessing that you were using a low octane fuel.
But that is more of a knocking sound
 

Octane

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Yeah dual exhaust with Carven and the 5 inch tips. But it did it prior to Carven install so nothing to do with that.
The reason I asked is that the factory duals on mine,as they exit and go upward from muffler the two pipes are really close.Not rubbing but I was getting symptoms as you as best I can figure.Maybe exhaust/ vibration resonance.I put a small block of wood wedged in that narrow space and mine no longer has that growling rattjng funky noise as it has since I bought the truck 2 years ago.And the two pipes were not rubbing either.I looked for the muffler pipe dampers that the factory had on the trucks but they discontinued them
 
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bchap05

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When you explained the conditions under which the noise occurs, i was guessing that you were using a low octane fuel.
But that is more of a knocking sound

I run 91 because of my tuner. I was using 89 prior and the only time my truck has had 87 was non eth. So I don't think its a ping. I even tried 91 without my tuner and it still did it.
 
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bchap05

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The reason I asked is that the factory duals on mine,as they exit and go upward from muffler the two pipes are really close.Not rubbing but I was getting symptoms as you as best I can figure.Maybe exhaust/ vibration resonance.I put a small block of wood wedged in that narrow space and mine no longer has that growling rattjng funky noise as it has since I bought the truck 2 years ago.And the two pipes were not rubbing either.I looked for the muffler pipe dampers that the factory had on the trucks but they discontinued them

Interesting. I'll have to go look back there. To me it sounds more underneath me or front of dash area. But noises can throw you off. I remember a long time ago I had a squeak I thought was in the front on my 2006 ram and it ended up being a rear body mount from my lift.

Edit: I went and looked. You talking between the pipes and body or between the two pipes? I kind of smacked everything around and didn't hear anything that sounded loose but never know. I'll just keep trying stuff until I eventually figure it out.

I tried stuffing some rubber in that bracket that I posted the pic of earlier. But that did nothing. I could still hear it I think. Was very quiet today, but like I said its always intermittent. Usually when I want it to do it then it refuses, and when I don't its loud.
 
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Octane

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Interesting. I'll have to go look back there. To me it sounds more underneath me or front of dash area. But noises can throw you off. I remember a long time ago I had a squeak I thought was in the front on my 2006 ram and it ended up being a rear body mount from my lift.

Edit: I went and looked. You talking between the pipes and body or between the two pipes? I kind of smacked everything around and didn't hear anything that sounded loose but never know. I'll just keep trying stuff until I eventually figure it out.

I tried stuffing some rubber in that bracket that I posted the pic of earlier. But that did nothing. I could still hear it I think. Was very quiet today, but like I said its always intermittent. Usually when I want it to do it then it refuses, and when I don't its loud.
Between the two pipes.Mine was intermittent also.I never found anything loose either.It did always sound as if it was coming from passenger side somewhere tho.Ive read where people replaced bearings and worked on parking brakes etc and nothing ever changed.It always sounded like a mechanical noise too.
 

daveray9

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I run 93 with a tune, its not low octane and Im 95% convinced its engine noise not exhaust.

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bchap05

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I run 93 with a tune, its not low octane and Im 95% convinced its engine noise not exhaust.

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Have you tried it stock? Maybe you said and I missed it. So my truck definitely did it before I tuned it. Its done it since new. However I went to the dealer today to complain and set an appointment for Wednesday. On the way home from the dealer it was doing it bad. I was like hmmm should make sure I can recreate it stock otherwise they will say it's my tuner. Its even been so loud my wife had looked over like wtf is wrong with your truck?

So being I have the Pulsar I just on the fly go back to stock. And unfortunately I can't recreate the noise. Go back to performance, easily recreate, back to stock nothing. I know the noise isn't caused by the Pulsar because like I said it's always done it. But my concern is if I can' recreate it without the Pulsar obviously the dealer will just say its the Pulsar. Maybe the amped up timing of the Pulsar is messing with the torque converter? I've checked every heat shield, cats, etc. I'm 90% convinced its the torque converter chattering. It would make sense as to why it won't do it in neutral or park..

If it was a metal part such as a heat shield, U joint, Shock bolt, exhaust hanger etc it shouldn't matter if the truck is cold or warm. I've also noticed if I start the truck and drive somewhere it won't do it on the way there. If I park, turn the truck off, then come back to the truck 10-20 min later or so its very loud. So it's like the truck needs to be warm, then sit, then drive again. Have confirmed this multiple times recently. Went to lowes other day, on way there nothing. On the way back it was loud. Went to Home Depot this weekend, same thing. On the way to dealer this morning nothing, park talk to service rep for 10 minutes, head home, loud noise. Which is odd I don't get why that would happen, but it seems to be the only time I can make it consistently loud is on a trip back from where ever I went.
 
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bchap05

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Not to talk to myself here. But been trying all day to make it make the noise with the Pulsar in stock. It refuses, sounds fine. If I put any tune eco, eco no mds, tow, tow no mds, performance, performance no mds I can make the noise fairly easily. Peaks the loudest in performance. Eco is even milder than stock so that doesn't make a lot of sense to me.

So guess I'm cancelling my dealer appt tomorrow. Any thoughts on that? The truck has always made the noise even before the Pulsar. But apparently any tune is exacerbating the problem now apparently?

Of note my Pulsar does mysteriously think my truck is a 6 speed often and i have to manually turn it to 8. It should default to 8 when started but mine will often go to 6 and stop.
 

daveray9

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Mines always done it.. with or without a tune.

Sent from my SM-G960U using Tapatalk
 
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bchap05

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Mines always done it.. with or without a tune.

Sent from my SM-G960U using Tapatalk

Thanks, I ended up calling Edge and they were like that isn't normal, plus the going into 6th gear when I have an 8 speed thing so they said to send in my Pulsar for repair. So pulled it off the truck yesterday. Will see when I get it back if i still chatter.
 

Turbo88

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So I've brought this up before but I know noise diagnosis is hard over a forum, but it's bugging me again. So quick background. My truck has made this noise since I bought it new. I've told the dealer about it a few times, but never really pushed them on it, and now I'm past bumper to bumper. However the noise is while accelerating so it could be covered in drive train which I still have. It has gotten louder recently I've noticed so that is why I bring it up.

Things it is not:

  • I thought maybe it was a heat shield or my exhaust rattling but it is not. (pretty sure)
  • Its not a tick or lifter type noise, I've had that and had bolts fixed.
  • It's not aftermarket as it did it stock the day I got it new.
  • Don't think its tied to the engine as it wont do it in park or neutral
  • Not MDS as I can kill mds with my Pulsar and it does it either way.


1. It's hard to describe but sort of a metal sound can rattle. Almost like a ping but its not pinging. Not super loud if the music is on I usually don't hear it. If I roll down the window I can hear it but its almost more difficult due to wind and road noise.

2. It doesn't not make the noise when in neutral or park and revving. So therefore it has to be tied to the drive system making the truck move.

3. I can make it do it on command. To make it make the noise I need to be moving (40-50 seems to be easiest) When the truck has down shifted and is in a high gear, if I lug it and barely push the pedal lightly it will rattle rattle rattle as it slowly accelerates. If you push a bit harder it quits or gets hidden behind exhaust noise. It doesn't seem to do it in lower gears. Its not shifting when it does it, it remains in the same gear. More of a lugging noise.

4. The only time besides lugging that I hear it is if I'm way up in the RPM band. So if I'm towing up a hill, or really getting on it and am in the 5k rpm+ range it will do it real quick.

Its never seemed to have caused any issues with the truck. Nobody else seems to have this issue but me, as I 've asked around before. The only way to probably diagnose easily would be to have the truck on something like a dyno where you can get the drive line moving without actually moving so that you can listen and figured out where its coming from.

Any ideas? Torque converter? Transmission? Something fuel line related? Something electronic that happens when you hit the throttle? Like I said hasn't caused issues with the truck its just annoying and makes my truck sound more ghetto.
Have you figured it out yet bc mine sounds like it's doing the same think mine sounds like a mechanical door opening with a growling sound
 

Dylan Campbell

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Did any of you guys ever find a solution for this? I am half relieved to find this thread and know I am not alone chasing this sound, but also half discouraged that it seems to be impossible to track down.
 

BellevilleRam

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Not sure if my issue was the same as yours but I was having this awful braaaaaap metallic sound at certain RPM's and after looking about under my truck I discovered that the spare tire heat shield was vibrating against the exhaust. After a quick tweak with some pliers on the heat shield, my exhaust sounds awesome again! I should mention that I have an aftermarket Flowmaster Outlaw catback exhaust.
 

burner71

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my old engine used to do this accelerating. Was told it was piston slap.
After i installed my new motor it's gone.
 
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