Car Repair World

How To Test Fuel Injector Helpful Information When a fuel injector malfunctions it can allow an excess or minimal amount of fuel into the engine causing engine run-ability problems. The fuel injector is designed with a pintle valve that allows fuel to flow as a spray pattern while the computer provides opening signals in prescribed amounts regulating volume. A common misconception about cylinder misfires is they cause the engine to run rich, in the absence of combustion the cylinder contains 14 parts air to 1 part fuel (14:1) which causes a lean condition. When a system trouble code scan is performed detection of a sensor failure is not guaranteed, a crankshaft position sensor for example, is difficult for the computer to detect. If injector pulse is not detected, and computer system is powered up with all obvious sensors and wiring checked or replaced, try disconnecting all non-essential sensors, example: oxygen sensor, coolant sensor, throttle position sensor, air intak...

How To Replace A Fuel Injector Helpful Information A fuel injector is used to supply fuel to one or more cylinders. A multi-port fuel injection system or TBI (throttle body injection) uses two fuel injectors to feed six or eight cylinders and one injector to feed four cylinders. Direct port injection or DPI uses one fuel injector for each cylinder. Each of these fuel injector styles depend on a uniform spray pattern which requires on a constant fuel pressure supply. Common injector failures include: leakage, short circuit and fully or partially plugged pintel nozzle. Tools and Supplies Needed Replacement fuel injector and O rings and gaskets Shop towels Socket and ratchet set. Wrench set. Screw driver set Best Practices Replace the fuel filter when servicing a fuel injector Clean throttle bore Use new sealing O rings on the fuel rail Step by step guide on how to replace an automotive engine fuel injector, the application will vary, but will still be relevant t...