text: should i put more fuel to my engine with cold air intake and iat sensor mod on my 00 grand prix? will cold air intake and the iat sensor mod. make my car run to lean getting to much air. to little fuel? or will the iat sensor make the proper adjustments? you don't need extra fuel. it may run slightly lean at first, but the iat and computer will adjust after driving a few miles. just take it easy the first 20-50 miles, then you should be good to go.