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Rough idle? P0171, P0174? Here's what you need to check first!!!
Replaced line, same codes Hi there, I had the same 2 codes and found a hold on the elbow in the back as well. I replaced the whole assembly for $35 from the dealer. Reset the CEL and the car has been running great. 5 days after the CEL came back on and am showing the same codes, running too...- smmjkg12
- Post #11
- Forum: 1st Gen Ford Expedition Engine & Performance
