ok i was drivng home with my z from chicago about a 55 mile drive and i went through a half a tank of gas and it smells like its buring rich. i think i might need new o2 sensors or a tune cuz i havent got one yet. any sugestions? i am taking to a chevy dealrship on tuesday to have it looked at

 

O2's could be a problem so could spark plugs, spark plug wires, egr, and a few other things. What RPM were you driving at?

 

Exhaust leak maybe?

 

2500 rpms it smells like its buring rich though. i think o2s ill probbly just give the car a tune up and change the pluges wires and o2s and hope for the best