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New to this Forum, I own a Fatboy Evolution 1998 since 2014, I'm a 56 years old driver, from Beirut Lebanon.
I'm facing a problem with my Fatboy, after a long hard drive ride i park my bike then the day after and for 3 to 4 days tying to start it again without any success, the coil ignition test is good from both sides , but there's no power arriving to the coil, after several failed attempts a few days after, the engine start giving signals that it will start with some exhaust explosions, this condition only occurs after a long hard drive ride.
ignition coil OK
spark plugs OK
i will appreciate your help Brothers
Last edited by Peter-1968; Sep 24, 2024 at 11:23 AM.
Reason: short message without content
@Peter-1968 I have moved this thread from the Welcome section to the Electrical/Lighting/Alarm section as you will get better responses to your question in this section.
How do you check the power on the coil? Does the stater work?
yes everything works, I tested the coil like the following
1 remove the wires
2 putt the ohmmeter on plugs place 12.5
3 on wires place 4 ohm
and actually i did replace the coil by another one i have it spare
Last edited by Peter-1968; Sep 24, 2024 at 05:05 PM.
Reason: More info
I think since you say it's not getting power to coil and you have determined coil is good which is easy with ohm meter, that's the Ignition control module looking for the Engine Crank Position Sensor.
The crank sensor is getting hot and cutting out.
The Crank Sensor is by oil filter. It's cheap. You can ohm it when good and then when it acts up.
Resistance is so low (1 meg) however, most meters won't check it accurately. Also can monitor it for about 4 volts AC
It's a coil of wire around a perment magnet. When the teeth in the crank come by, it creates a little AC current. Two teeth are missing. The ECM reads that and knows where timing is. Only then does it enable power to coil
PS. Welcome to the HDFORUM. Only as a suggestion make another new thread over in the newmember welcome area to say hello. Stick around and enjoy your ride here with us.
Last edited by Jackie Paper; Sep 24, 2024 at 07:53 PM.
yes everything works, I tested the coil like the following
1 remove the wires
2 putt the ohmmeter on plugs place 12.5
3 on wires place 4 ohm
and actually i did replace the coil by another one i have it spare
I mean how did you test the power on the coil.
Originally Posted by Jackie Paper
I think since you say it's not getting power to coil and you have determined coil is good which is easy with ohm meter, that's the ECM looking for the Engine Crank Position Sensor.
Carbureted Evo never had a CKP or security system. Also if his starter works it means the Engine Stop switch is powered and delivers power further down the circuit. So we need the OP to confirm if he has power on white/black wire at both ignition coil and ignition module when his bike is not starting but able to crank.
Last edited by Ya Tigor; Sep 24, 2024 at 08:58 PM.
Carbureted Evo never had a CKP or security system. Also if his starter works it means the Engine Stop switch is powered and delivers power further down the circuit. So we need the OP to confirm if he has power on white/black wire at both ignition coil and ignition module when his bike is not starting but able to crank.
My bad, thought this was the first TC year. Followed it out of Welcome area and missed EVO in title.
Thanks, I will listen but one question.. When I look at the pickup behind the timer cover 32448-95B SENSOR ASM., CAM POSITION/VEHICLE ATTITUDE. Does that mean it does have a bank angle feature that stops motor if bike drops?
dear, there's no power on both wires of the coil, also i did connect 2 plugs external on plugs wires and put them close to cylinder while trying cranking , no flames
the fuel pump is ok,
95% the problem is from the Crankshaft sensor position as Jackie Paper said, can't find one , still searching,
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Fatboy Evo Owner
