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Idle,yes! Accelerate no?

Softail Models

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Old Jun 30th, 2009, 11:36 PM     #1
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Idle,yes! Accelerate no?

I have a 91' Heritage. The bike will idle, but when I try to accelerate I lose power and it starts to backfire and pop thru the carb. When I let off the gas it idles fine. I have noticed when this happens I lose some power to the system. I have cleaned the carb. Relaced the voltage regulator, ignition module and starter relay. Sometimes I will lose all power and it will not come back on for about 1 minute but then starts ok. Help!
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Old Jun 30th, 2009, 11:40 PM     #2
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Re: Idle,yes! Accelerate no?

Have you tried the simple things,like cleaning both ends of the battery cables?
You could be having intermittent contact.
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Old Jun 30th, 2009, 11:42 PM     #3
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Re: Idle,yes! Accelerate no?

Main breaker could be weak or the popping on accel could be a bad diaphragm in the top of the carb.
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Old Jul 1st, 2009, 12:40 AM     #4
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Re: Idle,yes! Accelerate no?

The main breaker was replaced 2 weeks ago. The battery was replaced 2 months ago and the terminals were cleaned. When I took apart the carb I cleaned the diaphram and looked for any holes or wear but did not see any. The thing that gets me is the loss of some system power? I will check the grounds again tomorrow, but it only happens when I accelerate.
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Old Jul 1st, 2009, 08:14 AM     #5
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Re: Idle,yes! Accelerate no?

You may want to check the voltage from the charging system with increased RPM's.

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Old Jul 2nd, 2009, 12:11 PM     #6
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Re: Idle,yes! Accelerate no?

I had an issue with steel braided spark plug wires that did the same thing. Check the wires.....
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