fst4dr

I've got an 89 convertible. It was a 4 cylinder car but now has a 5.0 and aode. The swap was done really well from what I can tell. It runs great just really rich. If you stand behind the car, the fumes are really bad, and it gets horrible mileage. The swap was done before I bought it and the only mods I can see/know that it has are: cold air intake, shorty headers, off road H pipe, flowmasters, and 3.73 gears. any suggestions? Does it just need a chip?

Thanks

5.0stanger

Have your codes run, it could be a number of simple things.