Well, I did some minor experimenting just before dark today.
I pulled the temp sensor to clean it. It was not dirty at all. Hardly showed on the white rag.
Also I took the oppertunity to measure it. When cold (15C) it showed 40 kohm. Squeezing it between my fingers it started to drop. Down to 35 kohm in just a few seconds. Seems to work ok. I have no idea if the numbers are right, but it’s alive.
AFM next. Pulled the electrical connection. No difference at all. Runs the same. Cold start - idles but stalls with the slightest throttle. When warmed up it runs ok up until half throttle. Runs really ruff/rich when reving more than half throttle.
Same thing with the electric plugged in but the air pipe totally disconnected.
Blew AFM clean with compressed air. Same same.
To me this indicates the AFM is dead, which means I’m running with only the the TPS as the main input since there’s no lambda involved.
I’m surpriced it runs as good as it does in normal driving.
I read these early mpfi often had cheap capacitors in the magic box that start to leak. I hope that’s not the case here. I’ll try measure the voltage from the AFM tomorrow at different airflows. I hope it’s dead.