On 22 Sep 2003 21:44:56 -0700, maxchung2001@yahoo.com (Max) wrote:

> If I remove the fuel pump from the car (so it does not
>connecting to any fuel lines), can I just simply apply 12V DC to the
>fuel pump to see if it's working fine? Thanks.

You shouldn't have to remove it. Just disconnect the fuel filter input
up front and place a container under the open end. Jumper a 12 volt
lead from the battery back to the pump, and also a seperate ground.

If the pump is running but not much gas is getting through, check the
little cone-shaped plastic filter at the pump intake. It's there to
filter out large rust particles from the tank and sometimes gets
constipated with them. This is especially common on older cars with
rusty tanks.

If the pump is moving fuel, the next thing to check is proper fuel
pressure, which requires a guage be attached to the fuel rail.

If you do remove the pump, you need to connect a couple of hoses to it
and supply a source of gas to test it properly. Just because it makes
noises doesn't mean it's working right.