I've been having issues with 1392.
Problem: Car runs super lean 95% (20 on the afr guage) the time. After countless hours of research/replacing parts, I've narrowed down my issue to a bad maf. My current maf would work when it wants to, so I bought another stock GVR4 maf. Installed the new (used) maf, can ran like crap on the first start up and even stalled. After restarting, the car began to run normal and started to register normal afr readings. Took it for a drive, and ran great. So I come home and shut her down thinking that my problem is solved..
Restarted the car after sitting for a hour, same thing. Afr is still on 20 and car runs like poop, bucking between 1-3k rpms.
I'm completely lost, so far I've replaced:
Spark plugs (gapped to .28)
Spark plug wires
Fuel pump sock
GVR4 maf (used)
FPR stock GVR4 (used)
Any advice would be great.