I have a 1995 wrx sti it's started to make a whining noise when accelerating the sort of whine a water pump makes when it's knackered could this be the water or oil pump it doesn't seem to be coming from gearbox I have a oil pressure gauge sometimes when idling it reaches low readings and the warning light comes on the previous owner said it was temperamental and sometimes didn't work

 

I've got a whining noise in my car when I accelerate too................















................It's my missus!

 

I had a whining noise only on boost turned out it was the gasket between the dump valve and intercooler was leaking,got a new one and fixed the problem

 

Could be your power steering pump