1997 Ford F-150 Q&A
1997 Ford F-150 Question: what do i do if it say system too lean(bank 1 )
You take it to a shop where a confident technician could diagnose a lean condition which could be caused by quite few different things. Zee - ZeeTech
Its more likely the Oxygen sensor #1. There are other parts that mimic that symptom, but usually is the OS. Super Mario Bros. - F-150XLT
I replaced my pcv valve, spark plugs changed recently, cleaned the maf sensor and new air filter. Still says system too lean after I reset the computer. Now my rpms act up when idle and feels like ...
new fuel filter, plugs, cleaned MAF, cleaned IAC, no vaccume leaks found, New Air Filter. When if runs good it purrs perfectly. When it runs badly it idles up & down Fast and Cuts out on accelerat...