This car is hard starting at temperatures below -18 C. It will fire but
stalls when the starter is released. After several tries it will usually
run, if the battery hasn't died by that time. Once running everything is
fine. A friend gave me a GM computer code reader which comes up with Code
12. The book lists that code as: Diagnostic mode; no distributor signal to
Electronic Control Module; System PASS. Doesn't seem like much help, does
The mechanic at the shop where I take the company vehicle suggests water
temperature sensor. I see two, one in the thermostat housing and one
directly in the block next to it. I checked with a meter or removed either
to test them. Which one is it? Should I go out and buy at $30 or should I be
looking for the problem somewhere else?
I did install new plugs and wires, GM (originals) and that improved starting
but it still isn't where it should be. I knew the wires etc. weren't in
great condition as quite often there was some miss firing taking place at
Any help is greatly appreciated.