"Rapping" Noise From Cylinders: Correction
WARNING: This page does not describe the selected car, but rather 35 other vehicles, including the 1992 Pontiac Trans Sport, 1992 Oldsmobile Silhouette, 1992 Oldsmobile Bravada, 1992 GMC Yukon, and 1992 GMC Vandura Special. However, it is still accessible from the selected car via links, so may be relevant.
Check fuel delivery system for leaks.
Check fittings for leaks.
Inspect and/or replace nozzle.
Check nozzle operation. See I - SYS/COMP TESTS article.