@Steveo According to the FSM, the 1995 Caprice/Impala has the MAF, both 02's, AIR, EGR, and CCP valve all running off fuse #4, which is the one that blew-out, giving me some of the codes. The trans codes are weird, and I am digging into those too.
I replaced the fuse, codes went away. Started car. 02's initially showed "normal" voltage swings as the car warmed up. Once it entered closed loop, voltage swings slowed on both 02's, with one of the 02's stopping entirely. Car pegged BLM's, and the MAF started show an increase in flow, despite being at idle. Shut the car down before the fuse popped again because something is obviously screwed up.
Tested pink leads at the CCP and MAF. Both over 400 ohms to the fuse block. Tested continuity on those same wires (positive leads) to ground - both show 12 ohms resistance to ground, so there's something to check into. (The positive leads carry 12v AND go to ground. Not good.) Interestingly enough, while I was confirming the readings from the MAF to ground, it showed the 12 ohms and then instantly went to infinity, like something switched off. The CCP also showed infinity. Could it be a sensor or switch failing internally that ground when hot?
Good suggestion, but these grounds were 100% and nothing was painted there. The engine ground strap goes to the head - which is raw aluminum. The front grounding stud at the coil is the same I was using before - also to the bare head.
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