I have a thread in the wj section but I was hoping someone else as had this issue. I have a p0171 lean bank one code. My front three spark plugs (i6) were black with carbon as well as my 2 bank one o2 sensors. I replace them or clean them and it clears the code for a while... Could this be a inector issue? I have cleaned all electrical contacts around the TB and computer. Checked for vacuum leaks. Cleaned the TB and ran seafoam in gas.
Am I missing something?
La Vernia, TX
2004 WJ Grand Cherokee Laredo
4.0L Straight Six w/ 140xxx Miles
K&N Drop In w/ Air Box Mod