OBJECTIVES: I. Compare progression free and overall survival and frequency of response in patients with suboptimal stage III or IV ovarian epithelial cancer or primary peritoneal cancer treated with a 24 hour vs 96 hour infusion of paclitaxel (TAX) followed by cisplatin. II. Determine the incidence and severity of adverse events, including catheter complications and drug toxicity, for the 96 hour infusion of TAX. III. Compare the relationship between plasma TAX concentrations, toxicity, and response to both infusion schedules in this patient population.