It's actally been one of my better investments it was very cheap and NO check engine light since early June. The Ford dealer actually put me up to it, they ran a diagnostic on the check-engine-light and said it was an 02 sensor; he told me he had heard of a way of eliminating the sinsor with out affecting anything else and I began the search. I hated the check-engine light being on (people would always see it on and bla, bla) and I didn't want to spend $300 plus putting in new cats, we do not have vehicle emission inspection here so I figured what the heck, I'll give it a try.
