OBJECTIVES: I. Determine the dose-limiting toxicity and maximum tolerated dose of yttrium Y 90 anti-CEA monoclonal antibody MN-14 in patients with relapsed or refractory non-small cell lung cancer. II. Determine the dosimetric and pharmacokinetic properties of this treatment regimen in the blood, normal organs, and tumors of these patients. III. Determine the stability and complexation with circulating carcinoembryonic antigen of this radioantibody in the plasma of these patients. IV. Determine the antibody response of these patients with this treatment regimen. V. Determine the antitumor effects of this treatment regimen in these patients.