Low fuel pressure will cause the engine to run very leanly and therefore it may cause the engine to sputter. The fuel filters job is to filter the fuel going to the fuel injectors and then enter the engineA clogged fuel filter can cause the engine to get too low fuel pressure or cause a clogged fuel injector. Small Engine Mechanic What Do They Do And How To Become One And as you know a car engine is one of the most expensive components in a vehicle. . In fact this light comes on whenever there is a problem with the motor. This synthetic fuel additive removes all varnish in the fuel system without having to remove the carburetor removes carbon deposits and water revitalizes rubber and plastic components replaces lost octane and rejuvenates old fuel. How to Become a Small Engine Mechanic. The fuel filter should be replaced after a schedule and if you. Mechanic In A Bottle is the solution to FIX poor or non-running 2 and 4 cy...