EVO All Evo Model Discussion

'94 road king idle drops

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Old Sep 12, 2016 | 12:10 PM
  #11  
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Check your ignition sensor and make sure it hasn't melted.
 
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Old Sep 12, 2016 | 01:00 PM
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Originally Posted by Hey Man
Check your ignition sensor and make sure it hasn't melted.
Are you talking about the ignition pickup or cam sensor?

Those usually fail when the motor is hot.
 
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Old Sep 12, 2016 | 02:33 PM
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Originally Posted by Hey Man
Check your ignition sensor and make sure it hasn't melted.
what/where is the ignition sensor and how would I go about checking it?

Update: I pulled the spark plugs today to see what fuel conditions they are running and saw that the front one was flat white and the rear was really black. I also noticed the rear spark wire was really corroded and in bad shape, it didn't lock down on the plug nearly as well as the front spark wire. I don't know if this has anything to do with the funky idle but I went ahead and ordered a replacement set as the ones on the bike are the originals.

Left is from the front cylinder, right rear

 
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Old Sep 12, 2016 | 02:45 PM
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Deleted for stupidity.
 

Last edited by texashillcountry; Sep 12, 2016 at 05:39 PM.
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Old Sep 12, 2016 | 05:43 PM
  #15  
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Originally Posted by BT80
what/where is the ignition sensor and how would I go about checking it?

Update: I pulled the spark plugs today to see what fuel conditions they are running and saw that the front one was flat white and the rear was really black. I also noticed the rear spark wire was really corroded and in bad shape, it didn't lock down on the plug nearly as well as the front spark wire. I don't know if this has anything to do with the funky idle but I went ahead and ordered a replacement set as the ones on the bike are the originals.
Not firing or weak firing on one cylinder damn sure wouldn't help your idle.

Check out the port in your coil where the rear plug wire plugs into.
It could be corroded as well.
 
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Old Sep 12, 2016 | 09:01 PM
  #16  
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Originally Posted by texashillcountry
Check out the port in your coil where the rear plug wire plugs into.
It could be corroded as well.
Just did, looks like new, at least compared to the other more corroded end. The other terminals look very good as well.

I also just finished taking a small wire brush to all wire terminals (especially the corroded one), applied dielectric grease and replaced both spark plugs. Won't get a chance to test the bike out tonight but def will tomorrow on my way in to work.
 
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Old Sep 13, 2016 | 09:01 AM
  #17  
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Originally Posted by BT80
what/where is the ignition sensor and how would I go about checking it?

Update: I pulled the spark plugs today to see what fuel conditions they are running and saw that the front one was flat white and the rear was really black. I also noticed the rear spark wire was really corroded and in bad shape, it didn't lock down on the plug nearly as well as the front spark wire. I don't know if this has anything to do with the funky idle but I went ahead and ordered a replacement set as the ones on the bike are the originals.

Left is from the front cylinder, right rear
Based On your latest info, I would start with plugs and wires. After running a while a wire's resistance will increase causing the rear cylinder to drop out.

Also get a FSM and test the coil. You'll need a vom.
 
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Old Sep 13, 2016 | 11:29 AM
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Originally Posted by 98hotrodfatboy
Also get a FSM and test the coil. You'll need a vom.
What is a FSM? By vom do u mean voltage meter?
 
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Old Sep 13, 2016 | 11:35 AM
  #19  
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Originally Posted by BT80
What is a FSM? By vom do u mean voltage meter?
FSM = Factory Service Manual

vom = Volt Ohm Meter or multimeter depending on which term you are more familiar with.
 
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Old Sep 13, 2016 | 12:57 PM
  #20  
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Originally Posted by texashillcountry
FSM = Factory Service Manual

vom = Volt Ohm Meter or multimeter depending on which term you are more familiar with.
thanks for the clarification! I do have both of those
 
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