'90 200 tqa fuel pump

[Joshua Van Tol]

On Mon, Dec 19, 2011 at 7:52 AM, Nick Lawrence <nick at beol.net> wrote:
> I hooked the my battery charger straight to the fuel pump still in the car and could hear a buzz. It did not sound like any working fuel pump I've heard.

Some battery chargers don't have very well filtered output, relying on
the battery to filter out any AC still present in the output. It could
be that the pump is fine, but being driven by an AC signal from the
charger, hence the buzz.

Try a battery instead.