mixture control cyl 1-4
 

I have check engine light and my code reader reads out that I have mixture control idle cyl 1-4 and mixture control idle cyl 5-8 .what parts do i need to fix this.Thanks

Not a matter of what parts, but a matter of first finding out if it is a rich or lean mixture problem, then if it is adaptive mixture or multiplicative. (idle vs under load) If it is rich multiplicative (under load) you will need a MAF sensor. If it is lean adaptive (at idle) you need to find the source of unmetered air. (vacuum leak)

From the looks of it you most likely have a vacuum leak. Check the 2 crankcase vent hoses at the back of the manifold. (they go to the back of the valve cover) They are usually the first to go.

Also, what year/mileage X do you have?

I was getting the same codes on my 2001 4.4 a few months back. I couldn't find the meaning for the codes anywhere. I had my local indy clean the throttle body and injectors and the error went away.