Mitsubishi Repair: 92 eclipse gs rough idle and stall while in gear, eclipse gs, radiator fan

Question
Hello I have a 92 eclipse gs,The problem is when the car is at normal
operating temperature and in drive or any gear the car rough idles and
eventually stalls,what I have noticed is that it does it more so and even dies
when the radiator fan kicks on,I know the radiator and fan have been
replaced and the MAF sensor is clean.I have also put in a fuel system cleaner
and I do not know when the fuel filter was last replaced but if it was that it
would'nt it be stalling all the time,could it be electrical? an open ground
perhaps? Any help would be appreciated

Answer
John,
You should first have your alternator and battery tested.  If either are not performing at full capacity, this will cause your car to run rough and eventually stall.  You should also have your ignition timing ignition system checked.  If your timing is off or items like your spark plugs are worn out, you will stall out.  Have your mechanic inspect your car's computer as well.  You can read this article for more information about the troubled Mitsubishi computers:
http://www.90gsx.com/eclipse/cap/caps.htm

If your ECU is faulty, it can cause stalling and would need to be replaced.
Good luck!