[ryansprimeauto]

Ever since I have had this Porsche it has done this to me. I start the car and it runs great but every time i do something that pulls additional power such as turning on the heater/ac fan or rolling the windows up and down, or puttung the top up and down i feel some vibration in the car like it's a bad ground or motor shaking, battery going bad. I have seen other cars do this to but have never asked what causes it and how to fix it. Sometimes it will even do it off and on whle its ideling but that is rare but again it always does it when i do something that pulls additional power. Please give advice.