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Excessive Backfiring

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Old Dec 24, 2009 | 08:47 AM
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Default Excessive Backfiring
02 Heritage w/carb, stock pipes with baffels cut out. I've had a lot of backfiring for quite sometime now and get'n a little anoying. What could be the cause/fix?

TIA

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Old Dec 24, 2009 | 02:34 PM
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Originally Posted by LDB187
02 Heritage w/carb, stock pipes with baffels cut out. I've had a lot of backfiring for quite sometime now and get'n a little anoying. What could be the cause/fix?

TIA

LB
Lean AFR or hole in exhaust. Are your spark plugs bright white? If you cut out buffles you decreased back pressure making AFR leaner.
 
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Old Dec 24, 2009 | 05:38 PM
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Originally Posted by car5car
Lean AFR or hole in exhaust. Are your spark plugs bright white? If you cut out buffles you decreased back pressure making AFR leaner.

exactly....
 
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Old Dec 24, 2009 | 06:24 PM
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Originally Posted by LDB187
02 Heritage w/carb, stock pipes with baffels cut out. I've had a lot of backfiring for quite sometime now and get'n a little anoying. What could be the cause/fix?

TIA

LB
Had backfiring ,popping problem last summer on my wide glide ended up I found intake seals leaking causing lean afr as someone mentioned above.
 
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Old Dec 25, 2009 | 09:18 AM
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the plugs look good so i'm thinking maybe a leak somewhere. I've been running baffle-less for 80,000 miles now and have never messed with carb except when i first went to the stage one. 95" w/HC pistons, 204 cam, thunderject carb kit, hypercharge AC.
 
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Old Dec 25, 2009 | 10:10 PM
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Originally Posted by 96 WG
Had backfiring ,popping problem last summer on my wide glide ended up I found intake seals leaking causing lean afr as someone mentioned above.
Bad valve seals cannot change AFR.
 
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Old Dec 25, 2009 | 10:17 PM
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Originally Posted by car5car
Bad valve seals cannot change AFR.
He said intake not valve seals.
 
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Old Dec 25, 2009 | 10:58 PM
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Check and see if you have a head gasket leak, mine did the same thing as the gasket was going out.
 
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Old Dec 26, 2009 | 06:53 AM
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Like all the folks said, check the exhaust seals first, and if you get some baffles back in there, you'll probably pick up some torque as well.
Scott
 
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