I replaced the 2-wire T-stat today. Will test run Wednesday.
I did check the air flow meter. Pins 1-2 read 5K....15K...10k (at max depression of plate.
But the ohmmeter needle jumped around, like the air flow inside was "skritchy."
From pins 2-3, I read (plate closed) 9K...15K...5K (at max depression.) Again, the ohmmeter needle jumped around as I depressed the plate.
May need to replace? Or clean the contacts inside the air flow meter...?
But is there and adjustment for it when reinstalling?

__________________
BnObob (for the fallen flag railroad.)
Artic "Snow" White 1989 300E, 124.030
w/ M103 engine, and 106K orig miles.