Help need ASAP please

[rickap7]

I have a 90 5L vert.
I went to start it up yesterday reconnected the battery the fuel pump sounds like it is on(then hum) and it sounds like the injectors seem to be running but the key is not in the ignition. Any ideas on what be cause this? The battery is basically new but it is showing only 11.89volts. The car just sits in my garage it runs great when I drive it I just don't drive it much

 

[jaymac]

do you always disconnect the battery when you park it?
If you just reconnected the battery and heard the fuel pump cycle on, try tapping on or flicking the fuel pump relay, located under the drivers seat. it might be stuck, or "frozen".
As far as the injectors being "running", I'm not sure what you mean...

 

[rickap7]

Thank you I did not know the relay was under the seat.
I do disconnect the battery when it is in the garage parked.
I think I have something that drains the battery if I leave it connected.
The car is only driven on the weekends.
I changed batteries with one from one of my other cars and it started right up.
Again thanks

 

[jaymac]

If your relay is frozen, then that will def. drain your battery.
New ones run about $22, if that is indeed the problem.
let me know it that's it!