OK....Heres the deal, had a P0303 signifying miss on #3 Cylinder. Running rough at idle and under load at stop signs..etc. At the mechanics, they found that the nr3 coil was getting intermittant "pulses" from the PCM (after we replaced the plug and tested using another used coil....same issue, intermittant pulse). They ordered a replacement computer, installed it and now have the same freaking problem!.... Still intermittant pulse to #3 Cylinder. Now I am not a mechanic, but it appears to me that the wire going to nr 3 coil has a problem between the coil and computer?.....
Has anyone ever experienced this problem with a 4.7 (mine is N code, non HO, 2002 GC Lim). I have a trip this friday to Idaho and desperately need my jeep in full running condition.

Need help please!!!

OkieSteve
Ada, Oklahoma

 

are coils individual if so swap two see if miss fire move if so replace coil ?