96 f250 P0171&P0174 need help passes all vac test
Asked by Miller0888 Mar 19, 2016 at 04:02 PM about the 1999 Ford F-250 Super Duty XL LB
Question type: Maintenance & Repair
Don't see anything visually don't see anything wrong with live data passed all
vacuum test
3 Answers
Check mass air flow sensor ...as well possible ecm may need update ...
Miller0888 answered 8 years ago
Mac passed mode 6 test how about a restriction like low flow injector but that shouldn't give me a lean condition in both banks a weak fuel psi regulator I'm leaning too