I assume it's the V/6 MPFI since you stated fuel 'rail' is that correct? You sure it's fuel (gas) comming out of the air cleaner?? What's been done to the engine recently???
RepairPal Certified shops can diagnose and repair your 1990 Chevrolet Celebrity. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.