EVO All Evo Model Discussion

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Old Feb 1, 2020 | 07:50 PM
  #1  
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new Harley owner need help with a no spark....its a 1988 fxrs sp. ive tried everything in the manual. still no spark....new coil, new ignition switch , new plugs. wires ohm out good . I have 12plus volts at coil.battery is good and ready at 13.2 volts.ignition module comes in at 5 volts per the manual. what am I missing?bike is a 1988 fxrs sp.
 
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Old Feb 1, 2020 | 07:53 PM
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Cam sensor is probably bad.
 
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Old Feb 2, 2020 | 07:07 AM
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Originally Posted by tin sandwich
new Harley owner need help with a no spark....its a 1988 fxrs sp. ive tried everything in the manual. still no spark....new coil, new ignition switch , new plugs. wires ohm out good . I have 12plus volts at coil.battery is good and ready at 13.2 volts.ignition module comes in at 5 volts per the manual. what am I missing?bike is a 1988 fxrs sp.
When you say "everything in the manual." are you using the HD Factory Service Manual, or is it another brand of book?
 
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Old Feb 4, 2020 | 04:45 PM
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I will second the cam sensor as you pretty much replaced everything else. The nose cone cam sensor (especially on the earlier evo's) have a reputation...but then again our bikes are getting up there in age. If you search cam sensor you will get the idea of what to check and where to purchase.

T150vej just recently posted a nice quick and dirty "how to" on checking the cam sensor. I saved it somewhere, but again it was a pretty recent post, should not be hard to find. YD

EDIT: Found it:

https://www.hdforums.com/forum/evo-c...o-spark-2.html
 

Last edited by Yankee Dog; Feb 4, 2020 at 04:48 PM.
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Old Feb 4, 2020 | 05:49 PM
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Here's a video that will help determine if your cam position sensor is doing is job... Even though I did this on my 77 FX there ignition it's an updated 90'S SE programmable ignition with a Standard Motor Products Hall effect cam position sensor that works identically like yours.
 

Last edited by 98hotrodfatboy; Feb 4, 2020 at 05:52 PM.
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Old Feb 4, 2020 | 09:00 PM
  #6  
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If you sensor looks like this that's a problem.


 
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Old Feb 5, 2020 | 06:59 AM
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Sounds like the cam sensor to me as well. Last summer, mine was all melted and I was not getting spark. Installed a new one....good to go.
 
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