Just to clarify the "lean issue."
I had real bad pinging which I could not attribute directly to the aircharger because it didn't start until maybe a month after installing the kit. When I took my truck in for diagnoses the dealer said they couldn't find anything wrong with my truck but that it was running just a bit lean which they didn't think was a problem. They felt that it could be because of the air intake, told me to run premium fuel, and charged me $80 to look at it.
As it turns out, I talked to my ex Audi mechanic who I have known for quite a few years and asked for his opinion. He basically told me that was bullshit. He said a lean condition was most likely due to an oxygen sensor that is beginning to fail; which is normal at the mileage I am at. He said the engine control system should be able to compensate for the intake system and it was highly unlikely that was my problem. Really, the condition was so minor that it isn't a problem yet so I went on my way.
As it turns out version 1.12:
The Nissan dealer did not properly diagnose my problem. They may have checked my fuel mixture and such but they overlooked something very basic that I assumed they would check. That something was my timing. I hadn't checked it myself becuase I adjusted it last summer and didn't think it would be out of whack. Then I delayed because I figured the dealer had checked it when I took the truck in. Well I finally got around to checking it myself a couple weeks ago and found it to be 5 degrees too advanced, which is undoubtedly excessive. I pulled the timing back into spec and haven't heard a ping since. Made sure I tightened down the adjustment bolt well this time too!
As for the lean dondition, I jsut don't know. I intend to replace my oxygen sensors before next summer anyway as a part of regular maintenence so if that's an issue it should be taken care of then. Otherwise I'm not going to worry about it at this point since even the dealer said it's very minor and not a problem. For all I know they didn't even interpret the information correctly.
That's my story and I'm sticking to it!
I have no idea what went wrong with the other kit. Too bad Rick and I didn't get a chance to take a peak before Stu removed it.