when my compressor kicks on my engine jolts real bad and then runs like shit. im running 8ga. w/ a relay. my compressor is a 550.... and when the headlights are on it barely runs.as soon as it shuts of the truck runs fine. any ideas?
check the voltage with the motor running and comp running if it is not like 13 volts take the altanter to auto zone and have them cheak it out or check the battery out