Engine revvs up all by its self.
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Joined: Aug 2014
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From: Atlanta, GA
Engine revvs up all by its self.
When I start my bike, the engine revs up all by its self and will not rev down. As if you twisted the throttle and do not let off. I have been told that the throttle position sensor may be bad or I may have an intake leak. I know for a fact it is not the cables binding or the butterfly valve sticking open as I have already inspected both of those. The throttle itself functions just as it should. The engine just doesn't revv down, and when riding, it actually revvs up higher and higher.
This whole problem started out of nowhere so I am assuming its something loose? Is that a dumb assumption? What should I check?
I can take it to the dealer and it is under warranty but my dealer has a 12 day lead time and this is my only mode of transportation now so i'd like to check it out first and make sure its not a simple fix. I cant be down a bike for 12 days unless I absolutely have to.
Bike: 2014 Sporty 48 EFI no carb.
This whole problem started out of nowhere so I am assuming its something loose? Is that a dumb assumption? What should I check?
I can take it to the dealer and it is under warranty but my dealer has a 12 day lead time and this is my only mode of transportation now so i'd like to check it out first and make sure its not a simple fix. I cant be down a bike for 12 days unless I absolutely have to.
Bike: 2014 Sporty 48 EFI no carb.
Last edited by Atlaska; Sep 8, 2015 at 12:22 PM.
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Joined: Aug 2014
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From: Atlanta, GA
Bike: 2014 Sporty 48 EFI no carb. This happens at all times when the bike is on. It does this during start up and then idles down a little bit. Then after riding it a few miles, the RPMs start to go up all by its self and only come down randomly. But then go right back up.
Road Warrior
Joined: Apr 2014
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From: Houston, Texas
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Joined: Aug 2014
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Like a fuel pak? No tuner installed.
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Road Master
Joined: Apr 2014
Posts: 841
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From: Yakima
Engine revvs up all by its self.
To check for intake leaks. When the bike is running spray some carb cleaner around the intake where it goes into each jug. If you get a change in idle then there is a leak.
Cruiser
Joined: Nov 2013
Posts: 197
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From: Central Coast California
My 2014 XL1200cp did exactly the same thing. I thought it might be the Throttle Position Sensor so I replaced it. Was cheap and easy to do. Didn't help.
Took it to the dealer as it was under warranty.
Since no "codes" were being generated they were initially stumped. Finally concluded it was a faulty ECM.
They replaced the ECM and it has run perfectly ever since.
Took it to the dealer as it was under warranty.
Since no "codes" were being generated they were initially stumped. Finally concluded it was a faulty ECM.
They replaced the ECM and it has run perfectly ever since.