I drive a 96 Impreza WRX, and my car battery keeps going flat. I have noticed that the Idle Speed Control Valve makes a buzzing noise when the ignition is off, and even if I return to the car later it sometimes makes a buzzing noise and appears to be on. My car battery has gone flat over six times now.

Its got to the point where I am having to leave Idle Speed Control Valve unplugged.

Any ideas? Would be grateful for any assistance. Thanks.

 

remove and clean with carb cleaner or buy a new 1 i got 1 left i think

 

Should that do the trick do you think? How much would you like for the part?
A friend of mine thinks it may be because I replaced my ECU with a UK spec ECU. Car runs well, so don't think the problem is because of that. Or could it be something to do with this?