FLHTK Engine Noise
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Stage II
Joined: Jun 2012
Posts: 2
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From: So Cal
FLHTK Engine Noise
Have a 2012 FLHTK with 3000 miles. Engine sounds normal except in when riding with extra weight, such as a passenger. Under these conditions between 2500 and 3000 rpm when riding uphill and pulling some torgue the engine rattles and taps at various intervals, no regular pattern to the sound and stops when throttle is rolled back. Any ideas?
Extreme HDF Member
Joined: Sep 2005
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From: Baton Rouge, LA
Have a 2012 FLHTK with 3000 miles. Engine sounds normal except in when riding with extra weight, such as a passenger. Under these conditions between 2500 and 3000 rpm when riding uphill and pulling some torgue the engine rattles and taps at various intervals, no regular pattern to the sound and stops when throttle is rolled back. Any ideas?
Elite HDF Member
Joined: Nov 2010
Posts: 3,846
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From: Simi Valley, CA
Pinging!
Need to get a tuner and play with the AFRs (air/fuel ratio) and timing curves a bit.
EDIT: I see iclick was responding at the same time as I was. He gave you a better answer LOL.
Need to get a tuner and play with the AFRs (air/fuel ratio) and timing curves a bit.
EDIT: I see iclick was responding at the same time as I was. He gave you a better answer LOL.
Last edited by 2black1s; Jun 25, 2012 at 03:45 PM.
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From: Glendale AZ
Damn, why are so many of our bikes having pinging and detonation issues iclick? Ive almost got mines eliminated with my PCV, but can it be they are all running lean? The map Jamie sent me actually has -# in the higher RPM tables.....that means leaner than the OEM map? Without hijacking this thread what gives?
Elite HDF Member
Joined: Nov 2010
Posts: 3,846
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From: Simi Valley, CA
Damn, why are so many of our bikes having pinging and detonation issues iclick? Ive almost got mines eliminated with my PCV, but can it be they are all running lean? The map Jamie sent me actually has -# in the higher RPM tables.....that means leaner than the OEM map? Without hijacking this thread what gives?
As far as the minus numbers in Jamie's map at higher RPMs and TPs (throttle position), this is because even stock bikes are relatively rich in those "open loop" areas of the fuel map. Obviously rich enough that Jamie found them too rich when developing his map(s). When we're talking about factory bikes being "lean", we're only talking about the "closed loop" portion of the map. The open loop, high RPM, high TP portions of the map are just as rich as earlier non-emission controlled bikes.
Cars are the same.
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Stage II
Joined: Jun 2012
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From: So Cal
always run 91 octane but the noise does sound a bit like engine pinging with a little metallic tone. BTW , excuse the previous typos.
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Elite HDF Member
Joined: Nov 2010
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From: Simi Valley, CA
Ideally yes. Real world - maybe, maybe not.
The knock sensing system has limitations and it is not always enough.
The knock sensing system has limitations and it is not always enough.
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