Go With the Flow: BASIC FUEL SYSTEM ANALYSIS

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BYJOHNTHOMPSONWhile BASIC fuel SYSTEM diagnosis may begin with a fuel pressure measurement, it certainly shouldn t end there. The SYSTEM s fuel volume and flow also must be measured and BASIC fuel SYSTEM diagnosis may begin with a fuel pressure measurement, it certainly shouldn t end there. The SYSTEM s fuel volume and flow also must be measured and 2007Go With the Flow: BASICFUELSYSTEMANALYSISGo With the Flow: BASICFUELSYSTEMANALYSISThe fuel injectors are atthe end of the line in anyEFI SYSTEM . The entirefuel SYSTEM and each ofits components exist toprovide proper injectorflow rate through the injector nozzlesand into the engine s cylinders. BASIC fuelsystem diagnosis should always be per-formed bearing this in mind. Diagnosingbasic fuel SYSTEM problems requires anunderstanding of components, fuel sys-tem design, pressure and flow theory, aswell as diagnostic techniques.

system strategy. If the PCM de-sires 40 psi of pressure, 40 psi is the target pressure it sets for the injector nozzles, not for the fuel rail! It’s important to note

  Basics, System, Pressure, Rail, Fuel, Basic fuel system, Fuel rail