Charged battery 4 hours at 2 amps. Checked battery voltage, it is 12.82 volts after 5 min. off the charger. Cracked open the fuel line at the cold start injector, fuel poured out, ignition is off. Disconnected spark plug wire 8, connected it to a spark plug and grounded the plug threads, cranked engine and saw blue sparks.

Temperature is now down to -13c, no chance of heating garage.

Checked resistance on that blue 2 pin temperature sensor on the top pipe leading to radiator. 21.82 kohms between pins.

Fuel dististributor was replaced with a rebuilt one about 3 years ago.

Next steps?

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1989 420 SEL