Ford F150 pulling up codes P0171 & P0174?
A couple nights ago I was out and my 98 f150 started to idle at a red light. Yesterday I was driving and it happened again, this time my CEL comes on. I took it to have the codes read and it came back as both P0171 fuel system lean bank 1 and P0174 fuel system lean bank 2. Today as I was almost all the way through pulling into a parking spot my engine stalled. Threw it in park turned the ignition and parked it. Now whenever I come to a stop and my RPMs get low the engine stalls with in seconds. What I did the rest of my drive home today was put my truck in park at every stop and rev the engine up just a bit so it wouldnt stall out. Anybody have and explanations for this issue or experience with this? It is a 5.4L.
Low fuel pressure on both banks indicates a common cause.
Replace the fuel filter.
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