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start up after vehicle has ran 1993 Gmc Jimmy

Car Model: 1993 Gmc Jimmy
Location: Meridian, ID Submitted on September 6, 2014

Meridian, ID

I have a GMC Jimmy with the 4.3L engine and I have replaced the spark plugs and wires, and the throttle position switch because of a code. I run the vehicle around for about half an hour and then shut it off for about 15 minutes it is hard to get started without pushing on the throttle a little and then you can smell rich exhaust fumes. Is there a sensor that reads the air fuel mixture that may be causing my issue or could it be something different. Trying to get it running better for my son.

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