I changed the timing belt, oil and filter, spark plugs and wires, coolant, and fuel and fuel filter. It runs fine except when it reaches normal driving temperature. When it reaches that it runs rough while it is idle. Used a code reader and it says misfire in #1, #2, #3, and #4 cylinder. I don't know if you can or how to check the coil packs. Could they both be bad and if so possibly be the reason? Also, I don't know what it is called (see picture) but the tube that comes out of the left side of valve cover appears to have been broken and glued back together. It is right in the angle part or appears to be. Was wondering what it is called and if that could be the reason for rough idle and engine light on? If not what else could it be? How to fix it?
Wednesday, October 24th, 2012 AT 8:55 PM