Well, since I put the new fuel pump on my car, it has a problem with running rich. The engine is throwing a code 12, normal, a code 34, MAP voltage, and 45, rich exhaust. I didn't think this car had a map sensor since it was carbureted. The guy at the carb shop says my fuel pump is putting out 11 PSI of pressure, but if that were the case, I should be rich all the time. It's random and usually accompanied by an SES light. Anybody have any ideas?