I\'m getting 11mpg in my 89 Jimmy!HELP!! I've had my 89 Jimmy for 6 years now. Love it!! I've had a 70 Jimmy, an 82 Blazer and the 89 is my favorite by far. This rig is in excellent shape mechanically and physically, but it gets terrible gas mileage (compared to the 18mph some people are getting) and the throttle is not very responsive. About a year ago I had the catalytic converter removed (no lectures please). This didn't seem to affect the way it runs or the gas mileage (been getting around 11-12 mph since I bought it). I still get a 32 computer code, installed new EGR valve and still no change. Do I have to install a new catalytic converter to keep the sensors from giving me errors?