I am giving you info from someone that has the pullies tooo. I have the pullies.

NO PROBLEMS. I also know others w/o probs. I have UR pullies which tend to be better products than the AEM ones...so that may be the difference.

I'm just saying don't discredit my .first hand experience

I live in NY drive in NYC all the time. have spent enuf time idling in traffic no probs....so the fault may still lie in poor wiring, poor electrical system to begin with or that AEM pullies were being used.