The problem I see with the TT is you cant tell if it is working via monitoring. We know it works, because Al has proven it works. I never had a problem with it on my car. My nitrous did not work with or w/out the timing tuner. The problem could have been pcm tuning all the time. You have one device intercepting a signal and the other device waiting for a certain reading.. What Ramchargers should have done is made it work so we could watch the readings.. What sucks is the device cost 270 bucks..