Hi, im new to hp and tuning in general. I had a friend help tune my 07 tahoe not to much done to the truck. Headers, cold air intake, catback, and a chuck norris cam. When the truck was tuned it was during the summer months well now thar its winter ive been struggling to get the tune to work with me. I ended up getting the hp stuff to try and get the tune done myself cause he has not been able to get it any closer. The main issue is the start up. With the stock tune it fires right up but with the tune thar was done it fires up then dies then for the news few times tryi g to start it you have to play with the pedal to get it to fire. It usually takes 5 to 10 times before it will stay running. Once it starts it smoles like a train tell it starts to warm up. Seems super rich bit we have tried removing fuel from 5 to 20 % we have even tryed adding fuel and nothing changes. Ive also compared the base tune with the stock and cant see anything out of the ordinary so im at a loss and asking for some help