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#1
Engine noise while accelerating
SE Level Member
05-16-2018
Hello Everyone,
I have been hearing an engine noise while accelerating lately.
When pushing it at or above 3k rpms I hear a “nun-nun-nun-nun-nun” rhythm over the normal engine acceleration. I don’t remember hearing this in the past. Does anyone have any experience with this sort of noise or do you think I should have it checked out?
2004 Grand Prix
3.8L V6 (non-super charged)
110k miles
Plugs and wires changed a couple years back
Thank you!
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#2
Re: Engine noise while accelerating
05-16-2018
gonna have to post a vix of said noises. that discription just wont do. lol
98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails
L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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#3
Re: Engine noise while accelerating
SE Level Member
05-16-2018
You mean my scientific description of “nun-nun-nun-nun-nun” isn't good enough haha
I will report back with a video if I can get some good sound quality.
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#4
Re: Engine noise while accelerating
05-16-2018
Caddyshack - "Na-Na-Na-Na-Na Putting Scene" - (HD) Scenes from the 80s (1980) - YouTube this part of caddy shack is all that came to mind at first lol
it could be a bad tire too. not knowing how old or worn yours are.
98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails
L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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#5
Re: Engine noise while accelerating
05-16-2018
yeah..I'm also in the .. dunno what nun nun nun is ..unless you are in church?
I drink..so consider that when reading my posts.
2010 Audi A6 Dual IC's
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#6
Re: Engine noise while accelerating
05-16-2018
Originally Posted by
BillBoost37
yeah..I'm also in the .. dunno what nun nun nun is ..unless you are in church?
Oh come on Bill...
we we used to play STUMP BILLBOOST all the time... if anyone can diagnose an issue based on obscure generic noise references, it’s you!
97 GTP Sold-prolly rusted away by now
2011 F-150 Yote powered
Too Hot to Handle, Too Cold to Hold
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#7
Re: Engine noise while accelerating
05-17-2018
Actually.. I am sitting here talking to wife and mentioned this noise that was mentioned. I think I know it.
What rpm are you seeing when you are hearing it? When I say nun nun nun nun nun out loud it sure as heck sounds like an engine bouncing off the rev limiter. Not that I'd have done that when I zipped by Advance and saw any of the usual guys out front.
I drink..so consider that when reading my posts.
2010 Audi A6 Dual IC's
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#8
Re: Engine noise while accelerating
05-17-2018
ps.. Bring on the stumping Ice ice baby ice.. lol
I may be out of the 3800 game for a while, I still got it though.
I drink..so consider that when reading my posts.
2010 Audi A6 Dual IC's
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Post Thanks / Like - 0 Thanks, 1 Likes, 0 Dislikes
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#9
Re: Engine noise while accelerating
SE Level Member
06-07-2018
My 2003 3.8L V6 does this.......To my knowledge this is the rev limiter in action, so you don't blow the engine. I believe you can remove this with some different chip/PCM process, not sure I would do that thou. If you rev to 4K+ RPM and then drop in gear, you might be picking up pcs of your tranny for a few blocks
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#10
Re: Engine noise while accelerating
06-07-2018
so oddly enough my car started to go nun nun nun nun.
i got proof lol
ended up being a bad wheel hub.
Shared album - MrScottydoggs - Google Photos
98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails
L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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#11
Re: Engine noise while accelerating
GT Level Member
06-08-2018
would that be nun-nun-nun or whup-whup-whup?
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"Silver Bullet" 98 GTP Coupe: Stock, rust free, and broadsided.
Old '98 GTP Coupe: VS Cam, 3.0, S2IC, 42.5#, TOGs, N*/LQ4, Corsa. it once ran a 13 flat
Older '98 GTP Sedan: Pullied, rockered, SSIC, etc. Stock 14.33 @ 96.5 / PB: 13.89 @ 101