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Discussion Starter · #1 ·
Hi Everyone
I have a 1998 454 that has an engine problem once it is warmed up. It starts and runs fine until warmed up then it starts to lose rpms and sounds like it starts misfiring and stalls. It will not restart until the engine cools back down and the same thing happens again. It happens just sitting there and when riding. I changed the plug and coil pack with wire. Would the CDI act like this? It seems to be a heat related issue and the CDI is mounted under the rear fender area away from engine heat. They are very expensive and would like to be sure it is the problem.
Thanks,
Greg
 

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Check the voltage at the battery at idle and at a slightly faster rpm. Tell us what you find
 

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Charging system is working so you can rule out the VR/Rectifier.
 
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