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This is usually a sign the starting mixture is too rich. You'll hold the pedal to the floor and make it easier to start, when this occurs.
Several causes, none of which would set the EPA-mandated OBD codes. A leaky injector would flood a cylinder, or more than one. A faulty engine coolant temperature sensor (ECT) will adjust the mixture very rich. Also, your 1990 has a cold start injector. It could be leaking as well.
Two checks are in order. First the easy one. Check the resistance toward the ECT from the ECU plug, or check the voltage at key on before attempting to start the car. Check the 7/9 FAQs for details on doing this.
The more difficult one is checking residual and working fuel rail pressure. Difficult because you don't have a gauge. But an alternative exists if you pull the plugs and sniff for fuel. Not always as conclusive as the residual pressure testing, but sometimes the leak is so bad you can't mistake the wet plugs.
How's your fuel consumption?
--
Art Benstein near Baltimore
Life is like a roll of toilet paper.
The closer you get to the end the faster it goes.
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