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Back fire through carb

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Old Jun 3, 2022 | 03:56 PM
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Default Back fire through carb

New here I have an 05 heritage that not wanting to crank up without a little throttle and would die out at stops without a little throttle. Now it's gone to hiccuping and back firing through the cab an idea's. I've changed the plugs cleaned the breather,and cleaned the IAC.
 
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Old Jun 5, 2022 | 01:00 PM
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Originally Posted by Taz77
New here I have an 05 heritage that not wanting to crank up without a little throttle and would die out at stops without a little throttle. Now it's gone to hiccuping and back firing through the cab an idea's. I've changed the plugs cleaned the breather,and cleaned the IAC.

Did it just start doing this, and was running fine before....??

Any recent work or mods done....??

Have you inspected the tank/petcock screen lately...??

Has it set for a period of time since last start...??

Just based on your description, I'd say check the carb jets for blockage/dirt/debris.... I'd at least pull the bowl with the carb still on the bike and inspect what it looks like in there... spray a little carb cleaner up through the jets...

Good luck with your diagnosis and repair...
 
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Old Jun 5, 2022 | 01:05 PM
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Check the plug wires. Make sure they are firmly attached to both the coil and spark plugs.
 
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Old Jun 5, 2022 | 01:06 PM
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Default Back fire through carb

Originally Posted by hattitude
Did it just start doing this, and was running fine before....??just started doing this

Any recent work or mods done....??no mods

Have you inspected the tank/petcock screen lately...??

Has it set for a period of time since last start...??no sitting

Just based on your description, I'd say check the carb jets for blockage/dirt/debris.... I'd at least pull the bowl with the carb still on the bike and inspect what it looks like in there... spray a little carb cleaner up through the jets...

Good luck with your diagnosis and repair...
Thanks
 
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Old Jun 5, 2022 | 06:38 PM
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To add to what Mr. Hatitude suggested - Drain the float bowl and see if there is any water in the fuel. Sounds a lot like a restricted pilot jet or water in the fuel.
 
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Old Jun 5, 2022 | 06:41 PM
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Originally Posted by MarlinSpike
To add to what Mr. Hatitude suggested - Drain the float bowl and see if there is any water in the fuel. Sounds a lot like a restricted pilot jet or water in the fuel.
it's injected I guess I forgot to mention that
 
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Old Jun 6, 2022 | 07:15 AM
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Well, that changes things... I guess I misunderstood the "cab" you stated and thought you miss-printed "Carb". Sorry.
 
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Old Jun 6, 2022 | 08:20 AM
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The title of your thread is "Back fire through carb" ....... ??




 

Last edited by hattitude; Jun 6, 2022 at 08:23 AM.
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Old Jun 6, 2022 | 08:51 AM
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Common fuel pressure issue- the hose from the check valve to the regulator developes pin holes, leaking pressure inside the tank. Time to replace the check valve, and the filter, while you're in there.
 
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