Strange noise coming from driver side muffler - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dion · 09-12-2002, 04:02 PM

Only the driver side, it sounds like it has a frog in it's neck and it makes a small chirp noise, kind of a blurp blurp. My Mechanic friend says it's the Muffler and the Muffler shop says it's a miss in the Engine making it sound that way. What do you guys think?

Edmond · 09-12-2002, 04:25 PM

I hope I understand your problem the right way...
I sounds just like the problem I had two weeks ago.
When I was driving slowly it was hardly noticable, but putting
the pedal down, it misfired like crazy. I waited until it was dark,
started the engine and opened the hood... It was like lightning
between two or three wires

So I changed the wires and that solved my problem.

Hope this helps....

Cya,
Edmond

71GMC_3/4T · 09-12-2002, 08:22 PM

Wait till it's cool and feel around on the top and look at the bottom for any cracks. Mine sounded really wierd for a while. It had a crack which created a flap that buzzed at certain times. Finally the metal fatigued and fell off. No more buzzing noise, but it is a little louder now, with a 3" hole in the bottom of the muffler...

dion · 09-13-2002, 04:35 PM

Edmond,
What kind of sound was it making? Mine makes the chirp sound here and there but muffled blup blup sound is all the time. Thanks.

NSANE68!!! · 09-13-2002, 04:45 PM

That's just FLOWMASTER'S FOR YA!! Sorry JMO, I had them and was so unhappy, cut them off and threw them in the trash. They were only on like a month or so. I bought MAGNAFLOWS.

Nuff said, best muffler I have ever bought. Nice deep rumble, and no frog noises or pinginig noises.

dion · 09-13-2002, 04:47 PM

Yeah, I'm about ready to toss these things.

Edmond · 09-13-2002, 05:56 PM

Dion, the sound is for me hard to explain in english, but it was a bit like 'blup blup' also.
But when I accelerated faster it sometimes fired in the exhaust... making a very loud 'bang'

I noticed also loss of power on the highway...
I had new exhaust and it sounded even harder, but that's normal, the old exhaust had more hole's in it than a Swiss cheese.

I hope this helps... Sorry in advance if my explanation isn't really clear.

Cya,
Edmond

1-PU70 · 09-13-2002, 07:55 PM

I had the same broblem and it turned out to be the baffel in the muffler was comming loose. You could try banging on the muffler but it might not rattle. After I took it off you could shake it and here it rattle.

72'BBGMCSGCC · 09-13-2002, 11:09 PM

NSane68!!! where did your get your Magnaflows?Thanks.

NSANE68!!! · 09-16-2002, 12:26 PM

I got them at my local muffler shop. But I've seen them in summit, jegs, ect.

09-12-2002, 04:02 PM	#1
dion 72 Cheyenne Join Date: Oct 2001 Location: San Diego Posts: 2,086	Strange noise coming from driver side muffler Only the driver side, it sounds like it has a frog in it's neck and it makes a small chirp noise, kind of a blurp blurp. My Mechanic friend says it's the Muffler and the Muffler shop says it's a miss in the Engine making it sound that way. What do you guys think? __________________ Burnout Idle 1972Cheyenne 1966/67Stouts

09-12-2002, 04:25 PM	#2
Edmond Registered User Join Date: Jan 2000 Location: The Netherlands Posts: 1,062	I hope I understand your problem the right way... I sounds just like the problem I had two weeks ago. When I was driving slowly it was hardly noticable, but putting the pedal down, it misfired like crazy. I waited until it was dark, started the engine and opened the hood... It was like lightning between two or three wires So I changed the wires and that solved my problem. Hope this helps.... Cya, Edmond __________________ 1971 Chevy C/20 Longhorn, 350/TH400, Edelbrock Performer, IMPCO 425 LPG Carb 1974 Chevy Camaro Z28 (Original) ------------------------- Capelle a/d IJssel, The Netherlands

09-12-2002, 08:22 PM	#3
71GMC_3/4T Weapons Of Construction Join Date: Apr 2000 Location: Colorado, USA Posts: 1,095	Wait till it's cool and feel around on the top and look at the bottom for any cracks. Mine sounded really wierd for a while. It had a crack which created a flap that buzzed at certain times. Finally the metal fatigued and fell off. No more buzzing noise, but it is a little louder now, with a 3" hole in the bottom of the muffler... __________________ 1971 GMC 2500, 402/TH400 4.10 Daily Driver Lafayette, CO

09-13-2002, 04:35 PM	#4
dion 72 Cheyenne Join Date: Oct 2001 Location: San Diego Posts: 2,086	Edmond, What kind of sound was it making? Mine makes the chirp sound here and there but muffled blup blup sound is all the time. Thanks. __________________ Burnout Idle 1972Cheyenne 1966/67Stouts

09-13-2002, 04:45 PM	#5
NSANE68!!! SLICER AND DICIER Join Date: May 2001 Location: Quuen Creek Posts: 1,383	That's just FLOWMASTER'S FOR YA!! Sorry JMO, I had them and was so unhappy, cut them off and threw them in the trash. They were only on like a month or so. I bought MAGNAFLOWS. Nuff said, best muffler I have ever bought. Nice deep rumble, and no frog noises or pinginig noises. __________________ 01 Tahoe 22's 2/4 drop and tv's 68 chevy money pit 51 chevy belair 95 Honda 900RR 05 GMC Siearra (company truck)

09-13-2002, 04:47 PM	#6
dion 72 Cheyenne Join Date: Oct 2001 Location: San Diego Posts: 2,086	Yeah, I'm about ready to toss these things. __________________ Burnout Idle 1972Cheyenne 1966/67Stouts

09-13-2002, 05:56 PM	#7
Edmond Registered User Join Date: Jan 2000 Location: The Netherlands Posts: 1,062	Dion, the sound is for me hard to explain in english, but it was a bit like 'blup blup' also. But when I accelerated faster it sometimes fired in the exhaust... making a very loud 'bang' I noticed also loss of power on the highway... I had new exhaust and it sounded even harder, but that's normal, the old exhaust had more hole's in it than a Swiss cheese. I hope this helps... Sorry in advance if my explanation isn't really clear. Cya, Edmond __________________ 1971 Chevy C/20 Longhorn, 350/TH400, Edelbrock Performer, IMPCO 425 LPG Carb 1974 Chevy Camaro Z28 (Original) ------------------------- Capelle a/d IJssel, The Netherlands

09-13-2002, 07:55 PM	#8
1-PU70 Registered User Join Date: Apr 2000 Location: Bradenton, FL Posts: 1,036	I had the same broblem and it turned out to be the baffel in the muffler was comming loose. You could try banging on the muffler but it might not rattle. After I took it off you could shake it and here it rattle. __________________ 1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters

09-13-2002, 11:09 PM	#9
72'BBGMCSGCC Registered User Join Date: Nov 2001 Location: Fletcher,N.C U.S.A Posts: 162	NSane68!!! where did your get your Magnaflows?Thanks.

09-16-2002, 12:26 PM	#10
NSANE68!!! SLICER AND DICIER Join Date: May 2001 Location: Quuen Creek Posts: 1,383	I got them at my local muffler shop. But I've seen them in summit, jegs, ect. __________________ 01 Tahoe 22's 2/4 drop and tv's 68 chevy money pit 51 chevy belair 95 Honda 900RR 05 GMC Siearra (company truck)

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