I have a 1989 s10 4.3 ltr 4 wheel drive. And last winter I would drive the truck down the road in the morning and then in the evening when I would try to start it I would have to press my foot all the way on the gas peddle just to get it to start. Eventually a few weeks later it wouldn t start and it was towed home. Today I have changed the spark wires, the spartan plugs, the ignition module, the ignition coil, distributer and the cap. I have also changed the fuel pump but the old fuel arm fuel pressure sensor is still on. And I have cut the exuast right before the catalytic converter in case it was bad. When I try to start it. It just tries to turn over. Sometimes it will start but I have to keep my foot on the gas to keep it running. It s also very rich and has black smoke coming out of the exuast. Thanks for any help.