An interesting problem...

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Aug 21, 2014 | 06:42 PM

mswing1234

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Joined: May 2010

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From: Wentzville, Missouri

An interesting problem...

I ran into a problem a few days ago. Everytime I'm running at speed and then slow down to stop, the engine dies when I pull in the clutch and let fully off the throttle. It starts right up when I hit the start button and seems to idle fine. It also seems to run fine and has plenty of power when I hit the gas. If I continue to rev the motor while downshifting coming to a stop, it keeps running but seems to run a bit rough until I'm stopped and rev it a few more times. I have a V&H FuelPak and I checked to make sure it still has the correct data. It also is not supposed to affect zero throttle (idle) performance anyway. The Clymer manual I have doesn't mention this particular case in the troubleshooting section. Possibly a sensor or the ECM? I'm checking the plugs when I get home.

Aug 21, 2014 | 06:52 PM

FroggyFatBoy

Outstanding HDF Member

Joined: Apr 2010

Posts: 2,477

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From: Western MD

my 07 FB did that when I first got it. it was hardly ridden and had low miles. I cleaned the throttle body and IAC valve with carb cleaner and 19k miles later it hasn't happened since.

Aug 21, 2014 | 07:43 PM

Tracker56

Road Master

Joined: Apr 2009

Posts: 754

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From: Southern Maine

I've heard that the speed sensor can also cause these symptoms. Are your turn signals cancelling like normal and is your speedo bouncing or erratic? These are also symptoms of a bad speed sensor. The sensor feeds a signal to the ECM and controls fuel metering for specific speed/RPM.

Aug 21, 2014 | 07:58 PM

spydyr

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Joined: Mar 2010

Posts: 705

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From: southern IL

I've had this problem, along with a speedo not registering speed. I replaced my speed sensor & IAC at the same time, and it hasn't happened since. I can only assume the speed sensor made the speedo work and the IAC made it stop dying, but maybe it was both. Either way, those run about $30 each, so I didn't mind too much.

Aug 21, 2014 | 10:10 PM

oct1949

Club Member

Joined: May 2007

Posts: 145,895

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From: 40 miles Northeast of Indy..

My 07 did that several times the first K... then I did Stg1 and SERT and dyno.. never had it again..

Aug 21, 2014 | 10:16 PM

mswing1234

Thread Starter

Road Captain

Joined: May 2010

Posts: 507

Likes: 4

From: Wentzville, Missouri

Thanks all. The speedo and turn indicators are all working and I've had a stage one for 3 years. I also pulled the plugs and they look fine. I guess this weekend I'll start really digging in. It's supposed to be 100 degrees all weekend....great.

Aug 22, 2014 | 03:01 AM

olongapo1

Road Master

Joined: Oct 2008

Posts: 970

Likes: 19

From: Philippines

Been there, Done that! Had the same problem last year. Faulty idle Air Control Valve (IAC).

Here is an important clue. In the Harley Electrical Diagnostic Manual, it states that the IAC resets itself each time the engine is shut off and restarted.

Inexpensive item. Just replace it.

Second piece of advice, throw your Clymer Manual in the trash and purchase a Harley Service Manual. Much more precise.