i have a 2002 1 ton standard i have replaced the lift (transfer pump) and injection pump when i'm in first gear it has lag seems to me like its not getting enough fuel i have a super chip programer flash paq when i have it on any kinda of performance- towing mode on it it seems to lag if its on stock it does fine i need to know what it could be is it the injectors or could it be the app sensor that i keep reading about?? i need help im out of town and have already spent 3500 on pumps i need help please