Diagnostic procedure for "no starts" (domestic cars)?
It is my understanding on domestic EFI gasoline that if the vehicle cranks good but won,t start, then you check for spark at the plugs, no spark, then you check for a signal at the injector/injectors, if you have neither, then you look for an rpm signal. It doesn,t matter Ford, Chrysler, GM all the same, no rpm signal, then you have no spark, no injector pulse, and other than the initial prime, no action from the fuel pump relay, correct? With the symtoms I listed, the logical process starts with the rpm signal, correct? I realize the rpm signal or the processing units ability to process the signal. I also realize if I take B+ away from the ignition module on my vehicle, there is no spark or injector pulse. Any thoughts? thanks
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