2.4, tried what I know....please help!!!

Ok, my Achieva was hesitating bad on highway, tried replacing coil pack housing, and spark plugs. Worked good for 2 days. Suddenly it not only reverted back to the previous condition, it now acts, and sounds like it is running on only 2 cylinders. Had the coils checked...they were fine. Checked to see if I was getting spark to all 4...Check. Now What?? Could it be a fuel problem or what. My wifes jeep is going in the shop next week and this was the only running vehicle we had. I need any and all ideas!

Thanks!!!

Welcome to AF.

Have you tested/checked the ignition control module (ICM) ?

If so, then it's possible it could be fuel related.
Could be low fuel pressure or clogged/dirty injectors.

Yeah, I had the ICM checked and it was good. I borrowed an OBD scanner from Autozone. I got three codes:
P0172 System lean
P0300 Random cylinder misfire
P1441 manufacturer controled aux. emmision controls

Any ideas???

P0172 System too Rich (Bank 1)
P0300 Random/Multiple Cylinder Misfire Detected
P1441 Evap System Flow During Non-Purge

What year was your Achiever ??

It`s a `96.