Good Afternoon Friends, I have an 87' AW11 MR2 that's having some charging issues. The car runs and drives fine and at idle it seems to be in the normal range. However Anytime I put my foot on the throttle the voltage goes up to about 15-18v and shakes (throttles between 15-18v) constantly. At times it will go insane and while driving the voltage will go everywhere from 8v-18v shaking extremely rapidly, I do not know what is causing this issue. Voltage is confirmed on the battery and it's not a dash issue. The alt was replaced about 2 different times for charging issues. This alternator has worked well for about a year and a half now. Any advice will help thanks!