I am wondering if anyone has heard of this happening. When I step on the gas HARD I get a temporary drop in system voltage. This only happens when I open up the throttle rapidly. If gradually increase the throttle, this does not occurr. In general, the charge system on the car seems to operate correctly. I would like to know what causes this.

-->1987 GXL

 

Have you checked the tension on your alternator drive belt. If it's slipping, you will lose power!

Mike

 

That, or the alternator is going bad. I thought you had a turbo, cause that's happened to me before and when you step on the throttle the electronic wastegate just bogs down the whole system and results in a major drop if the alternator isn't good.

Rishie