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Okay, so I have a 2002 Rubicon 500…bought it last year and it sat for several months until I put a new rear axle in, FINALLY got that done and was super excited to finally have my wheeler going, just to notice a strong gas odor. Popped the seat off and sure enough, pouring gas from the carb overflow. Fast forward a few more weeks and get the new carb and get it in, no leak! Yay. Except now I have no spark. 😒 I’ve tried another plug and checked and am getting no power to the coil pack. I’ve read and read and mostly what I’ve found is ECU, which is fine…but I like to exhaust all avenues before buying the more expensive parts just because I don’t wanna spend the money and it have ended up being something simple that I overlooked because I was trying to rush. 😂 I don’t know if it’s relevant, but I read on another post that someone had similar issues with theirs and it was the sensor on the side of the carb, just a thought since this literally happened after I put the new carb in. It also displays “- -“ on the display screen where it should show the gear position.
 

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You should not have power to the coil - you should have an appx 100 volt spike from the CDI unit on the blk/yel wire measured with a peak voltage tester - if you have that and no spark, the coil is probably bad, but the - - on the display is a mystery to me - I see nothing in the service manual that details that indication. Consult the owners manual to see if it details the source of the fault indication.

Here's how to find spark:
Font Material property Parallel Number Screenshot
 
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