Exhaust is on - sounds great... until... - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 05-30-2002, 10:33 PM Thread Starter
 
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Exhaust is on - sounds great... until...

It looks great! Sounds good, too -- while it's idling. Rev it up a little and it pops like crazy. It was doing that before, but I thought it was because of the holes in the pipes! Is this a timing issue? What gives? Waaaaaa
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post #2 of (permalink) Old 05-31-2002, 02:40 AM
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Re: Exhaust is on - sounds great... until...

Describe pops? If you stomp on it does the engine spew out black smoke? It could be that your engine is running rich and unburned fuel is igniting in the headers.

Thanks for the tip....*mumbles*....

[img]images/icons/laugh.gif[/img]

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post #3 of (permalink) Old 05-31-2002, 07:33 AM
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Re: Exhaust is on - sounds great... until...

Cheryle, what type of mufflers are you running?
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post #4 of (permalink) Old 05-31-2002, 09:08 AM
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Re: Exhaust is on - sounds great... until...

do you have glasspacks? They give than dumb crackle sound.
post #5 of (permalink) Old 05-31-2002, 09:09 AM Thread Starter
 
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Re: Exhaust is on - sounds great... until...

No black smoke. It revs smoothly, but when you let off the gas... POP, POP, POP. I guess it's hard to describe here...

I'm running dual flowmasters, but it's been so long since I bought them, I don't remember what kind of flowmaster exactly[img]images/icons/crazy.gif[/img]
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post #6 of (permalink) Old 05-31-2002, 09:10 AM
 
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Re: Exhaust is on - sounds great... until...

sounds like its back firing, a girl in my shop class old truck (77 Chevy I think) we doing that, turned out the 2 rear barrels (or whatever you call them) on her carburator werent opening
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post #7 of (permalink) Old 05-31-2002, 09:15 AM
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Re: Exhaust is on - sounds great... until...

might check timing too or carb may be running to rich (I think, or maybe it's too lean). Does it ever desiel out while driving or shutting her off?
post #8 of (permalink) Old 05-31-2002, 11:39 AM Thread Starter
 
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Re: Exhaust is on - sounds great... until...

It's a brand new carb, so it might need a little adjusting. No dieseling when shutting off. I did notice that it smells kinda gassy when it's idling... maybe it's a little too rich?
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post #9 of (permalink) Old 05-31-2002, 11:58 AM
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Re: Exhaust is on - sounds great... until...

that makes sence if it was too rich. Mine did the same thing after the motor swap where it backfired on deceloration ( I guess you could call it) but it just was timing.
post #10 of (permalink) Old 05-31-2002, 01:47 PM
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Re: Exhaust is on - sounds great... until...

9 out of 10 chebbies around here that have modified exhaust sound like that when getting off the gas... very loud and fast pop pop pop pop. one guy i know really digs that sound and downshifts his auto everytime he stops to make it REALLY loud and annoying. i dont know what causes it exactly, but i'm guessing it has something to do with the size of exhaust pipe used. one exception is our 95 tbi burban with split duals and cheap red glasspacks on each pipe, it is LOUD and DEEP but none of that annoying popping, best sounding chevy i've ever heard. i think the shop kept the pipe pretty small though, which i bet helped tremendously. i dont think you have an engine problem causing it, it's just a side effect of your exhaust setup. what size pipe/tips are you running?
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