1974 Porsche 914 2.0L

VIN 4742902433

engine GC 002880 (from a 1975 914, VIN 4752909073)

ECU 280 000 052 

Air temp sensor ts1 183 ohms @ 90F 

fuel injection

fi 1: 2.7 ohms 
fi 2: 2.4 
fi 3: 2.7 
fi 4: 2.9 




ts2 cylinder head temp: 1.25 kohms @ 90F 

Air filter Mahle LX234

Auxiliary Air Valve: 280 140 007. Cold resistance: 15 Ohms, open at cold start

Deceleration Valve

Deceleration Valve 280 160 108

Test: pull vacuum on control port (small bore tube) whilst trying to blow through one of the other ports. Note vacuum at point where blowing is possible: should be around 17in Hg. Check.

MPS

Type 0280 100043

MPS primary 96 ohms
MPS secondary 1.4 kohms

I just tested my (working) 043 MPS and obtained numbers: 1.03H, 0.92H and 0.62H at 0in. Hg, 4 in. Hg and 15 in. Hg. (Paul Anders has 1.39, 1.18 and 0.71 for the 043.) My elevation is about 864ft, so around 730 Torr and the correction to Paul's numbers would be 730/723 - hardly any difference.

I used a very good TES multimeter that is capable of measuring up to 40H. Another check would be to put a capacitor in parallel, and frequency sweep the circuit for a maximum, and calculate the implied inductance. Perhaps I'll do that (With a 150nF capacitor, I think the resonant frequency would be around 400Hz - and would change with vacuum - this might make a novel electronic musical instrument to suck and blow!)