All I can do is give All Thanks and I am Grateful for this Program..I spent much money and time from several shops trying to fix My check engine issues...Finally with the assistance and guidence of Valley Can program we were able to finnally resolve the problem..Here in bakersfield .Ca. I took it to Elias Smog Shop, and they were very helpful, and got right on the Problem...Yes they handled it like True Pros...Thank U for ending ,and fixing My Car...Yes, Now it Passed Smog !!...B Ford