"This is a great diagnostic tool for any Ford with an ODB II port. I bought is primarily to work on my '99 7.3L Powerstroke, but have also found it very helpful on a '98 4.0L Ranger and '03 4.6L Explorer. If you have a diesel and plan on doing most of maintenance and repairs yourself, I consider this a must have tool. If you can avoid one trip to the dealer or a diesel shop for a diagnostic test, the tool has pretty much paid for itself."
"Awesome product! Easy, quick installation. Fixed my oil leak."
"I was skeptical even after reading all the positive reviews. IT WORKS! My results: Noticably quieter, and smoother. I even had an occasional passenger ride with me and mention how much smoother and quieter the truck was. He had no idea I had done anything, he came up with that comment without any prompting. Worth twice the price."