E4ME E4MC CARBURETORS RICH AUTHORITY ADJUST SPRING

AS A RUNNING CHANGE DURING THE 1983 MODEL YEAR, E4ME AND E4MC CARBURETORS WERE BUILT WITH A RICH AUTHORITY ADJUSTING SPRING UNDER THE SOLENOID STOP SCREW (RICH STOP). THE SPRING IS USED TO PROVIDE HOLDING FORCE FOR THE SCREW INSTEAD OF THE COLORED PLASTIC INSERT (PATCH) PREVIOUSLY INSTALLED ON THE SCREW. IT IS IMPORTANT TO NOTE THAT A RICH AUTHORITY ADJUSTING SPRING SHOULD NOT BE INSTALLED IN CARBURETORS WHICH ORIGINALLY WERE BUILT WITH THE PLASTIC PATCH ON THE SCREW. CHANGES WERE MADE IN THE AIR HORN TO PREVENT POSSIBLE INTERFERENCE OF THE ADJUSTING SPRING WITH AIR BLEED VALVE. SOME REPLACEMENT E2ME SERVICE CARBURETORS MAY BE BUILT WITH THIS FEATURE.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.