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  1. TECH Members ONLY
    Cant find anything on scanner except electric pump pressure jumps to 70 psi during hiccup and high pressure rail goes from 26000 to as low as 5000 psi. Truck jumps bad like a tranny issue but got one code p0191. Is it likely its one of the fuel pressure regulators? Might just replace entire high...
  2. Stereo, A/V
    New here and thx for add. Own a 2017 base model 3500hd dually. When demanding throttle it shudders/studders acts erratic. Only kicked code once which was p0191. I cleaned map sensor which was super dirty. 120,000 miles. Just changed fuel filter and motor oil to eliminate that. Not sure if dirty...
1-2 of 2 Results