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Hello all, I am becoming a bit frustrated in my truck recently. It is a 1998 dodge ram 1500 sport 5.9l auto, and I'm only pulling in around 5 to 6 mpg. Granted I only drive in town, but I would at least expect 10-11 mpg. Here's some more background. About 4 months ago I added a gibson super truck exhaust, cat back set up. After about a month, the catalytic converter plugged up. In a pinch for money, I punched it out and I've been driving it. To me, it seems to be running incredibly rich, you can smell it easy. I'm guessing the reason the catalytic converter plugged up was due to it running rich in the first place. Any guesses on why it would be running so rich? I'm sick of using 1/4 tank everyday around town. Thanks in advance for any help!! :4-dontknow: