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Could be a variety of problems. Bill's comments are highly accurate as are Jim's. I've also seen similar problems that I have attributed to the all-too-familiar residual fuel pressure leakdown problem. Typically the car has the most trouble starting when hot. the cold start valve will spray since it takes littel pressure, but the cart then stalls after a few seconds when the CSV quits spraying. The cylinder's injectors don't spray until the fuel pressure comes up a bit. If this doesn't happen soon, the car starts and stalls several times before running, poorly on just a few cylinders, then slowly adds cylinders as injectors open to the rising fuel pressure.
I confess I don't have a fuel pressure testing set but have always wanted one. They are essential to CIS trouble shooting. ESSENTIAL. And now they are much less expensive I hear.
Anyway, it could be a variety of things and there are procedures for isolating them one by one. For the home mechanic this is far less expensive than guessing. For the commercial mechanic, guessing is the more lucrative option.
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'83 SC
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