I called my car several times with starting problems and no one could find anything wrong. All of their tests went well, but I knew there was a problem. I was looking up some stuff and found this guy so I gave it a try. Now my car runs great - rolls over and all (you know how cars are supposed to be haha)! It's easy to install if you do a little research on your car's specs and have access to the YouTube world. If you have a bit of DIY skill you can install this yourself in 30-45 minutes with a few small tools and some decent lighting.