Proper Electrical Supply: The DC electric motors in electric fuel delivery systems are dependent on consistent electric supply. They require good battery voltage, solid connections, proper wire gauge, good ground and a properly operating alternator.
Debris in System: Fuel delivery systems are composed of valves, seals, diaphragms and orifices. Dirt and other debris can disrupt the proper operation of these components. A clean system is imperative. Clean or change your filters often, and periodically check the system for debris. If you are about to install a new system, make sure you clean all installation trash out of the fuel lines. Pay close attention to stainless steel lines.
Voltage Step-down Devices: Never use step-down devices (voltage reduction boxes) on MagnaFuel fuel pumps. Never operate any electric motor on lower voltage than the motor was designed for. Low voltage can cause motor fluctuation and excessive amp draw. MagnaFuel recommends 12.5V and higher
Gauges: Gauges are tuning tools only, and should be removed from vehicle during racing conditions.
Air in System: Any air going into fuel pump on the intake side causes the fuel to foam. Foam will create fluctuation in regulated pressure, oscillation in the pump motor and lean air/fuel mixture. Poor seals on the inlet side fittings, poor placement of the fuel pickup and/or return lines can cause this problem. Return line to fuel cell should be as far as possible from the pick up line fitting.
Fuel Cell Vent Size: If the fuel cell vent is too small, it can cause excessive load and heat in the pump. You should run a minimum of a #8 vent for all applications.