CLEANER, I concur with most everything in the preceding posts, the EZ definately makes a big difference... it is not at all subtle; feels like a different truck.
RustyJC, you mentioned that your truck in a little smokey with the EZ on setting 3. I noticed the same thing when I first installed mine, I was even considering knocking it back to level 2 to decrease the smoke a little, but never got around to it. Anyway, the truck does not smoke anywhere near as much now as it did when I first installed the EZ. I read somewehere on the boards about the ETH having an "intelligent" ECM that was capable of detecting the presence of the EZ, and would adjust itself over time to compensate for the extra fuel. I don't know about the smart ECM business, but my truck definately does not smoke near as much as it did. I was playing around on my commute this morning, trying to see how much smoke I could produce by hammering it at low boost levels. The best I could do is blow a fairly innocent looking puff of smoke, not even enough to be objectionable! The truck does not seem to have lost any power, just lost some smoke! Has anyone else with an EZ noticed a decrease in smoke after a couple thousand miles? I'm going to disconnect my batteries this evening, it is my understanding that this will cause the ECM to reset itself to the default setting. I will report in tomorrow what effect, if any, this has on smoke and power.