Check engine light on.


2000 3.4L V6 4x2 4runner

CODES: P0171 lean bank 1. P420 Cat Low.

Things I've done: Replace spark plugs, Cleaned out Air Filter, Cleaned M.A.F. sensor. Compression test on cylinders all within 10 psi, Checked resistance on ignition coils & spark plug wires, all within specs. I've been treating the fuel system with LUCAS.

The check engine light has come off and on 2xs the past 600 miles.

Though I was able to pass smog by pulling my computers fuse out for a couple seconds. Just annoying to see that its burning an orange image into my eyes.


Any Ideas...