85L98-84L83 wrote:
My 85 vette gets 21 mpg on the highway and my 84 vette gets about 27 on the highway. What should I check for. I have replaced plugs wires cap & rotor, fuel filter, removed air pump, removed cat, added K&N, cut airlid and even added the dreaded air foil and replaced the throttle positin sensor(because of a code).

Could it be the injectors? How would I be able to check they still on the car? Could some of the injectors be spraying extra fuel? I have no codes being thrown. When I first got the car a year ago I added the above stuff and it went from 16 mpg blowing blue smoke to 21 mpg and no smoke, execpt on the odd start up after it has sit for a week.