- Mar 26, 2020
- Truck Year
Tried to smog today and my test are failing because some of my emission monitors are not coming back on. This code when read states fuel quantity error or something of that nature. I went from a SFT Stage 1 tune back to stock and have drove it probably over 500 miles. They have verified that it in fact the stock tune that is loaded. I have even installed new fuel filter just for good measure, cleaned DPF Injector, air filter, and MAP. Any ideas on what I can get to fix this. I do have an appointment at the dealership, but it is not until next week.