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Old 01-18-2005, 02:22 PM   #1
fossilrunner
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popping noise

I unbolted my exhaust yester day so it was running with just the maniflods.It was pretty loud but when I reved it up after I let off the gas it starter making a popping noise like it was back firing.Would this have something to do with the carburator or maybe the timing?
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Old 01-18-2005, 02:59 PM   #2
67ChevyRedneck
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Does it pop with the exhaust on? I've always been told a motor needs a certain amount of "backpressure" to run right and taking off the pipes reduces that. Just what I've heard. I remember when I was a kid in NY that a lot of mufflers rusted and fell off cars and I seem to remember they "popped" under deceleration. I have no idea if it is true. But if it pops with the exhaust on then I would definately check the timing and carb adjustments. You didn't give much info to go on. Does it run bad, or idle high or low, power loss....etc???
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Old 01-18-2005, 04:13 PM   #3
Tx Firefighter
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They all do that when you're running straight manifolds.
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