Need Help. No Spark 05 Fatboy

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Jan 7, 2020 | 02:12 PM

Bspike1

Thread Starter

Road Captain

Joined: Feb 2010

Posts: 629

Likes: 4

From: Owensboro, Ky

Need Help. No Spark 05 Fatboy

05 Fatboy fuel injected has no spark. Cranks but doesn't fire. Have replaced the CKP sensor and the coil. Any Ideas where to look next or further troubleshooting ideas?

Last edited by Bspike1; Jan 7, 2020 at 02:13 PM.

Jan 7, 2020 | 02:14 PM

Scudda

Stellar HDF Member

Joined: Feb 2012

Posts: 3,293

Likes: 3,519

From: PA

What is your battery voltage? I had an issue with mine that was close to the same. It turned out to be a bad battery

Jan 7, 2020 | 05:25 PM

Bspike1

Thread Starter

Road Captain

Joined: Feb 2010

Posts: 629

Likes: 4

From: Owensboro, Ky

new battery as well. It's not showing any codes

Jan 7, 2020 | 10:27 PM

Crotonrz

Cruiser

Joined: Aug 2016

Posts: 247

Likes: 59

From: California

It’s almost never the coil, the CKP is more common, but I’d check your ECM connector for corrosion possibly.

Jan 7, 2020 | 11:06 PM

chief08

Road Master

Joined: May 2015

Posts: 791

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From: sf bay area ca

check the system relay

Jan 8, 2020 | 03:48 PM

Vernal

Club Member

Joined: Apr 2013

Posts: 7,683

Likes: 8,415

From: Utah

Quote:

Originally Posted by chief08

check the system relay

The system relay also powers the Fuel pump, OP never mentioned if it comes on and runs for 2 seconds.

Jan 8, 2020 | 03:56 PM

Jackie Paper

Seasoned HDF Member

Joined: Mar 2010

Posts: 38,668

Likes: 6,460

From: Honah Lee

How are you checking for fire. You need plugs in. A test plug grounded to cylinder. Also needs perfable a Harley Plug. Your old system uses resistance read by coil to adjust timing for spark knock . Although NGK has a lookalike plug and will work, it's twice the resistance of a Harley plug. I have run them but drive easy. Not sure how accurate system will be to aggressive ridding

Last edited by Jackie Paper; Jan 8, 2020 at 04:03 PM.

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Jan 9, 2020 | 07:30 PM

Vernal

Club Member

Joined: Apr 2013

Posts: 7,683

Likes: 8,415

From: Utah

Harbor freight sell a plug tester like the one pictured.

Jan 10, 2020 | 09:41 AM

#10

Zanthamos

Outstanding HDF Member

Joined: Feb 2015

Posts: 2,414

Likes: 433

From: Arkansas

Does the bike have a power commander installed? If so disconnect it and check the connections for the ECM, I have seen quite frequently that the plugs on the power commander get full of water causing all kinds of issues including no spark. Try plugging the main harness back into the ECM. Is there security system on the bike? Look for flashing turn signal lamps, HD factory security system will disable the ignition circuit and the start circuit, I have seen a fail of the TSSM cause the start circuit to function but the ignition to be disabled.