bandit86 -
I have one for my narrow-band 02 sensor but I disabled it :
http://ecomodder.com/forum/showthrea...efie-1308.html
I wasn't comfortable with the idea that I was hurting my emissions. If you read the thread, you will see that it appeared to be working in a funny way. However, I never used it enough to ascertain if it was helping MPG.
CarloSW2