1996 Saab 900 smells like it is running rich fuel mixture

1996 SAAB 900
152,546 MILES • 4 CYL • FWD • MANUAL
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SAAB 23
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Hard to start. Seems like it is starving for fuel. Kicks over run for a few seconds and cuts off. Takes several times for it to start and idle. Once idleing have to let run before driving for a minute or two.
Can injection run rich? I just got the car replaced the coil and now this started. It started sputering going down the highway which caused the check engine light to come on. I just don't know what to check..

Any Help would be appreciated..

what can you spray the ignition switch to keep it from sticking??

Thanks in advance
Dec 3, 2009 at 6:33 PM
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RASMATAZ
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Possible causes include a bad O2 sensor, excessive fuel pressure (bad fuel pressure regulator or plugged return line), leaky fuel injectors, dirty air filter or restricted air inlet, or a defective coolant sensor that prevents the engine management system from going into closed loop mode.
Dec 3, 2009 at 6:44 PM