Exhaust popping on deceleration
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Exhaust popping on deceleration
I understand an open exhaust like my VH Straight shots allows air to be sucked up the pipe during closed throttle and any unburned gas then ignites and pops.. I have leaned the carb to no avail.
I would guess a 2-1 exhaust would stop the reversion and stop the pop. Hate to spend $700 on new exhaust. Anyone have an idea?
I would guess a 2-1 exhaust would stop the reversion and stop the pop. Hate to spend $700 on new exhaust. Anyone have an idea?
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Decel popping can be caused by an intake manifold air leak. It can also be caused by either a lean or rich condition. So going lean can even make the problem worse. It isn't always unburnt fuel making the pop. It could be CO. And finally a loose exhaust flange can cause decal popping. The basic idea is to eliminate all oxygen from the pipes and close all air leaks.
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Seasoned HDF Member
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From: almost there
Decel popping can be caused by an intake manifold air leak. It can also be caused by either a lean or rich condition. So going lean can even make the problem worse. It isn't always unburnt fuel making the pop. It could be CO. And finally a loose exhaust flange can cause decal popping. The basic idea is to eliminate all oxygen from the pipes and close all air leaks.
When I leave throttle slightly open during decel it wont pop.
I do have the original full length baffles still in the VH straight shots.
Last edited by aces&8s; Sep 23, 2017 at 01:17 PM.
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Popping or backfiring? An exhaust leak up by the head can cause backfiring and lead to other problems. Ask Me How I Know...
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just popping and it did it before and after the new exh gaskets.
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I have already changed the exh gaskets. Plugs are a nice gray color so lean rich should be good. Not too worried about it. just popping more than usual.
When I leave throttle slightly open during decel it wont pop.
I do have the original full length baffles still in the VH straight shots.
When I leave throttle slightly open during decel it wont pop.
I do have the original full length baffles still in the VH straight shots.