2004 Hyundai Coupe Problems

Intermittently (about 30% of the the time), around 2-4 seconds after starting the car with the ignition, everything cuts out - the revs plummet and the accelerator is unresponsive as it cuts out. The problem seems to be deteriorating - ...

when i switch the ignition on the window button makes a buzzing sound passenger window was working but not now also when i use the rear window demister the window switch buzzes on the drivers side so none of the windows work have changed th...