Engine knock/idles high

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Oct 12, 2011 | 05:34 PM

elroy

Thread Starter

2nd Gear

Joined: Nov 2009

Posts: 6

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Engine knock/idles high

I have a 2009 Fat Bob with a 103" stage four and 18,000 miles. I've got an annoying engine knock. Sounds like a penny in a tin can or kind of what an almost empty spray paint can would sound like if you shake it really hard and fast. It is very loud after riding the bike hard for about 10 minutes. I can hear it over the exhaust. It has also caused the idle on the bike to idle a bit higher at stops. It's actually changed the sound of the bike(exhaust). Dealer thought bad gas and gave me some octane boost. I've been through 2 tanks of gas and nothing. Any ideas?? I also seem to have lost a little power.

Oct 12, 2011 | 05:58 PM

Harley Tim

Road Master

Joined: Apr 2009

Posts: 750

Likes: 3

From: 3rd Rock

Take it back to the dealer... a condition like that could be very damageing. Better yet, call them to come pick it up! (ON their dime)

Oct 12, 2011 | 06:50 PM

SuperFastGlide

Road Warrior

Joined: May 2008

Posts: 1,955

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From: Little Rock

collapsed lifter perhaps?

Oct 12, 2011 | 07:10 PM

8541hog

Ultimate HDF Member

Joined: May 2008

Posts: 6,642

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From: Ogden, UT

Quote:

Originally Posted by Harley Tim

Take it back to the dealer... a condition like that could be very damageing. Better yet, call them to come pick it up! (ON their dime)

Why would it be on the dealers dime, it's a 3 year old bike?

The erratic idle would indicate a vacuum/intake leak issue, which could also cause timing issues causing the knock.

Oct 12, 2011 | 09:30 PM

zukeeper

Elite HDF Member

Joined: Jul 2006

Posts: 4,053

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From: Southern IL

Quote:

Originally Posted by SuperFastGlide

collapsed lifter perhaps?

that is one thing I would be checking

Oct 13, 2011 | 04:01 PM

Harley Tim

Road Master

Joined: Apr 2009

Posts: 750

Likes: 3

From: 3rd Rock

Quote:

Originally Posted by 8541hog

Why would it be on the dealers dime, it's a 3 year old bike?

The erratic idle would indicate a vacuum/intake leak issue, which could also cause timing issues causing the knock.

Maybe it's just me ...But, it sounds like the dealership "dummied up", gave him a placibo, patted him on the a$$, and sent him on his way. And I know my guys would never do that to me.

Just sayin'

Best wishes...Tim (HT)