2016 Mercedes-Benz AMG GT S Used Cars in Charlotte, NC 28212. Avg. Dealer Rating: (5 reviews) They have been so great, answered all of my questions and very patient with me when I wasn't immediately responsive due to illness. They worked everything out for an out-of-state sale.
By examining the spark plugâs insulator color, even a less-than-mechanically-inclined person can determine valuable information about the engineâs overall operating condition. Normal: Grey to Light Golden-Brown Color. This condition is ideal, the spark plug and engine air/fuel mixture are operating properly.
How it's done: Scan the car for codes. Clean all surface areas around the spark plugs. Remove spark plugs. Inspect threads in engine head (where plugs are installed). Perform compression test if needed. Inspect ignition wires. Apply anti-seize to the threads of the spark plugs.