the ecu ate some of the board cause it was highly acidic. The mechanic only guessed MAF off the bat cause it exhibited simular behavior to when my MAFS went. Thus I didnt need to change one. Doesnt explain why I replaced 2 last year however. I wasnt under the assumption that the Selin was the problem, only wanted to know if anyone had reverted back to a single setup cause it is one less factor to deal with, and one less part to replace. Although the Selin is quite common now, it wasnt 2 years ago and Not all shops...say in Canada.... would be as effective dealing with them or diagnosing a car with it as Z shops in the US or California where you have Specialty Z. These parts are tricklin down from you guys... and AMS unfortunately. I will be keeping Selin cause I do think it is a great product and 2 cause you all said so ;) So thx for all the info and advice..... Oh and thx for the reply Jim, I appreciate the good customer service !!!!