I just installed 100% injectors in my truck and been doing my own tuning. Running Les' s gift tune timing table and duration table which I decreased some. Tune runs awesome but seem to have a rattle at low rpm low throttle and at idle. I'm thinking might be in my timing. I'm having a hard time understanding the timing calculator. Any help, suggestions appreciated. 100% injectors, lift pump, built trans, stock turbo for now.