You better not have voltage to the pump unless you're cranking the engine. If you do, you'd have a fire hazard in the event of a crash that ruptured a fuel line. You should only have voltage to the pump during engine rotation, (cranking or running). The easiest way to determine that is to measure the voltage at the coil pack, any injector, or either small wire on the back of the alternator. That's usually the dark green / orange wire.
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Wednesday, December 12th, 2012 AT 2:27 AM