i took off another safety device yesterday so hopefully it should work now. I noticed at the track yesterday that it did show 111 but the bottle had some weight to it still approx 3lbs left in it but no nitrous left just air so didnt get a good run in after the initial hit it jsut fell off again. Hopefully all is good with the system...event this weekend. I have the tach signal set up right for (4 cylinder...thats how its supposed to be set up according to the company and where i tapped it)