Ignition/Tuner/ECM/Fuel InjectionNeed advice on ignition issues? Questions about a tuner? Have questions about a EFI calibration or Fuel Injection? Tips on Engine Diagnostics, how to get codes, and what they mean. Find your answers here.
i assume you are testing pump outside of tank in a bucket of water??? if the inlet sock is remove-able, check for obstruction. also, you should be able to feed water through the pump via suction and out the discharge hose. if you know the impeller is actually turning and you can force water through pump, then the pump has issues.