Sorry my bad, yes I meant MAF. In addition, I missed stating a few other repairs:
dd) replaced fuel filter - not resolved
ddd) added 2 rear O2 foulers (sp?) - not resolved. Since they didn’t do anything, I took them off.
dddd) replaced again 2 new front O2, instead of Bosch, I used Denso. Short lived, the light went off for 1K+ miles then went back on and off
So yes, at this point , I haven’t touch or check these items: fuel pressure, fuel pump, fuel injectors, and the cats. I read from a couple places stating that checking the fuel pressure on our car (3.0 M54) , for some reasons, is not as simple as just attaching a gauge to to a valve in the fuel line? Could someone please tell me the correct procedure?