I started my car up at lunch time yesterday and noticed the whole car shaking really bad. Upon closer inspection the 4th cylinder isn't firing at all. I changed out the plugs and wires as it probably needed done anyway. Still nothing. I sprayed ether thru the intake and the cylinder fired. All i know for sure is that its something with the fuel system, I'm gona try to switch two of the injectors this after. I was wondering if anyone could point me towards my next logical step if that doesn't work.