BMW Coupes and Sedans 1970-1988 Repair Guide

Fuel Pressure



The following procedure will produce fuel vapors. Make sure there is proper ventilation and take the appropriate fire safety precautions, otherwise personal injury may occur.

Connect a pressure gauge to the union at the front of the injection pump. Idle the engine. The pressure should be 28.5 psi (194 kPa). If pressure is low, check the pump ground. If that is satisfactory and pressure is still low, replace the pump.