A fuel pump can absolutely affect ignition, especially on fuel-injected engines that rely on a constant supply of pressurized gasoline to support everything from spark timing to just getting the damned thing started in the first place. The fuel pump delivers a certain amount of pressurized fuel pressure—usually between 40-70 psi to the engine, which means that now more than ever before is being sprayed into each cylinder for combustion. When the fuel pump does not deliver enough fuel, or if pressure is irregular, then air-fuel balance becomes distorted and takes a toll on ignition which may lead to unsuccessful start.
But studies have found that a decrease of 10% in fuel pressure causes ignition misfires, and up to 15% can cause engine efficiency. This results in the fuel injectors to deliver precisely enough fuel before it is ignited through spark plugs (not too much, not too little). A properly working power pump allows this entire process. Last year alone, a recall affecting more than 700K Honda vehicles over defective fuel pumps which leads to stalling and ignition problems was issued.
While the ignition process relies primarily on this single specification, fuel pump performance greatly affects how effective this method is. It is essential in high-horsepower engines, where precision ignition timing plays a critical role, to use these efficient fuel pumps that deliver up to 340 liters per hour (LPH). Since these engines rely so heavily on high fuel pressure a drop in that can cause power loss and eventual engine damage.
As Henry Ford put it, “Quality means doing it right when no one is looking. That observation serves to demonstrate the necessity of a dependable fuel pump, which helps with not only engine operation but also running spark. This could lead to your engine experiencing harder starts, rough idling or begin occasionally misfiring eventually shortening the life of an engine and using more fuel.
Can a Fuel Pump Affect Ignition? the secret is in its function to maintain a constant fuel pressure. Problems with the pump were problematic for meeting ignition needs because anything that interferes increases or decreases the air-fuel ratio.
Check fuel pump webpage and learn more about how the pumps can effect on your ignition systems.