APC9199 wrote:
If the pump is wired properly through the appropriate relay, you should hear it (maybe open the hood to hear better) when you turn the key to "ON" but do not actually crank the engine. It will make noise for about 15 seconds then stop. If you don't hear it, you have a failed pump, bad connection in the wiring, or blown relay. You can check the relay by simply swapping it with a spare of the same type. The location is shown in the user manual fuse section.
If you can hear the pump running but you're still having issues, then it is either sucking tons of air and you have a failed fuel line somewhere, or there's a different problem with the fuel supply system.
, don't hear my lift pump anymore. I'm going to check my fuses and relays as soon as I get a new multi meter.
and to answer GordnadoCRD: I believe the lift pump is installed on the tank side of the fuel/water separator, I'm not sure what the CP3 is though. I'll check where the lines go to make sure.
update: Lift pump isn't working, but gets power for about 30 seconds after turning the ignition on. The pump is between the fuel tank and the fuel filter housing.