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Take a look at the wiring diagram. The fuel pump is powered by one circuit when the key is in the Start position and another when the key is in the ON position. There is a safety switch on the airflow sensor that is designed to stop the fuel pump if the engine stops running with the key in the ON position. The easiest way to test the circuit is to lift the air sensor plate with the key ON and listen for the pump. If the pump circuit is OK, your engine is probably stalling due to a lean condition at cold start, a common problem on old SC engines with lower compression, vacuum leaks, and out of spec fuel pressure. You need a CIS pressure gauge and a dwell meter to diagnose the problem. Your car also has a vacuum retard to help meet the curb idle HC test that can cause cold start stumbles and stalling. Remember to leave the throttle pedal alone when starting, you can only make the lean condition worse and cause a backfire. I would try disconnecting and plugging the grey vacuum hose to the back of the distributor, this should give you a bit more cold idle and may keep the engine running. Once it stays running, hook up an analog dwell meter to the green white stripe wire on the test plug and see what the CIS lambda is doing. It will talk to you, all you have to do is listen.
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Paul
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