Hi I'm having a strange issue with my 2006 1.6fsi the problem is it's misfiring when it hits low idle I've recently changed the spark pulgs air filter and I put second hand injectors. The car starts and drives but as soon as I stop it starts misfiring and looses all power and runs rough but if I turn the car off and back on it runs fine till I stop again. I noticed not all the wires where in the safety case but it doesn't seem like they're damaged could it be electrical as it's runs fine now. The fuel economy is also half what it was that's why I put new parts on. Sorry for the long post any help or advice please I'm at the point where I'm going to get rid of it.