Transcription of Go With the Flow: BASIC FUEL SYSTEM ANALYSIS
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BYJOHNTHOMPSONW hile 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
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