my friend said it hasnt been driving normal, and that it needs a tune up. i havent actually seen it since she told me, but i will today or this weekend. replacement plugs for the car seem to be around $2 a pop, which isnt too bad. and stealth mode is correct, its a coil on plug setup, so i wont be needing wires. a tech pm'ed me a told me i just need to change the plugs, air filter, and fuel filter