engine running & stalls, voltage drops to 0 (was: What is happening with my car?)
 

Well people! my 2002 Impreza WRX is reaching 5 years old., never got a problem during those years but now my car is experiencing a problem that is going me crazy.I turn ON my car and after few minutes turn off.Sometimes is difficult to turn ON the engine there's no check engine light on display.
The fuel pump can be heard loading every time i turn the key in ON position.
Did anybody experience this problem before.
I check the voltage of the fuel pump .,when the car is ON,12.7 volts can be seen on display and after 30 seconds the voltage drop to 8 vdc few minutes more the car turn off and the voltage drop to zero.

That's not really enough information to go on. If you're checking the voltage at the pump itself it won't tell you much (although zero volts is not good) because the pump does not get direct battery voltage. There is an electronic controller that regulates the pump.
Check the voltage right at the battery. It should read about 12.5 with the key off and nothing turned on, and 13.5-14.5 with the engine running. A low key-off reading indicates a weak battery, a low reading with the engine running indicates a possible alternator problem. If the alternator is bad the battery may need to be replaced as well since it may have been damaged from the heavy drain.

The battery was changed months ago and the car start cranking very healthty i don't think is the battery but i will check the voltage directly in the battery to see.This happened saturday but before that i remember in three occasion that my car while i drive try to fail i feel like if my car want to turn off for few seconds( we call that here "jalones").

Hi :) I just replied to your post in "Puerto Rico" forum
Anyways, you might have a vacuum leak.

P.D. Estoy segura que debe ser eso. Sabes trabajar en tu carro o lo llevas al dealer para que le den servicio?

Thanks man ...Gracias por la ayuda
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It sounds like you have a boost leak. You can do a test or you can start by checking the vacuum hoses for cracks, but the leak might not be visible. :(
also make sure the hoses are well connected and the clamps are tight.

Well ..My car was repaired today and apparently was a damaged computer relay The relay was changed and the car was tested in the road.No more problems.
I'll give the thanks to Alcrudo Jr and Peter at Auto Plaza SUBARU at Bayamon for their service and support.I'll appreciate the quality and dedication in their business.
A lot of thanks
........A lot of thanks to you all people at I club Forums for your recomendation and interest in help me to find the problem of my car.

Glad you have your Subby back :)