Words: Backprobe, Fuel, Injector, Ohmmeter, Pressure, Replace, Signal, Specifications, Voltage, Voltmeter The __________ __________ and pump control can be checked with an __________. Connect the meter across the __________ at the connector. Compare your readings to __________. If the reading does not match specs, __________ the injector or pump. The fuel __________ sensor can also be checked with a __________. With the engine running and a fuel pressure gauge connected, ____backprobe______ the sensor's output _____signal_____ and compare the pressure gauge reading and ____voltage______ to specifications