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Took mechanic out for run to identify issues. 03 175 hpdi..idle to about 1200rpm sounds normal..above 1800-2000 and up, starts to bog, chug, stutter. Can get above 2500 in reverse with no chugging or issue. Symptoms are same on main tank and portable tank. Same before and after decarbon of o2 sensor. Symptoms same before and after plug replacement. June 2019, replaced VST filter and gasket(do this annually), replaced vst tank pump in 2018, replaced low pressure pumps June 2019(one diaphragm was leaking), replaced upstream filter canister June 2019..was good from July 2019-September 19 and started hesitating again. So here’s where I’m at..ran YDS software today when getting to 2000-2500 rpm, fuel pressure(high) would surge from 705psi down to 475, up to 690 back down to 565, spike up to 705..you get the gist. Vst pressure has been starting at 35psi building to 47psi.
Thinking that the issue is upstream in Injector’s, mystery filters and high pressure pump. No error codes on YDS. All readings were in normal range. The only flash of red was the high pressure reading.
Reached out to injector Rx in Houston, shared video, said that based on summary and video sent along, recommended sending injectors, fuel rail and hi pressure pump in.
Any input would be helpful..rodbolt17, are you out there?
Thinking that the issue is upstream in Injector’s, mystery filters and high pressure pump. No error codes on YDS. All readings were in normal range. The only flash of red was the high pressure reading.
Reached out to injector Rx in Houston, shared video, said that based on summary and video sent along, recommended sending injectors, fuel rail and hi pressure pump in.
Any input would be helpful..rodbolt17, are you out there?
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