Don Faux: Need help!!! Owner of my 1st diesel. I have put around $25,000 into truck. 2013 Cummins. 63k miles. Everything is bone stock. I just put in a fast fuel system. I have the Race Me tuner. 5" turbo back exhaust. My problem sir if you can help. Cuz your you tube chan rocks. Ive learned so much from you. It doesn't matter what tune I have on my truck 200hp down to 30hp. Same with rail pressure 2000 down to 1850. Timing the same 35% down to 23%. Every time I get on the gas it cuts out like it wants to die. It did it very little before the fast fuel system. Now it's constant. The place I get my work done says the issue is bad Race Me tuners for dodge 2013 and up.