1999 Jeep Grand Cherokee Codes Po353,352,351

99 grand cherokee 4.0litre 85,000 miles died while driving, starts occasionally but lopes and stalls quickly. I turned key on-off-on-off-on, got codes 353,352,351 which in my manual are ignition coils 3,2,1 not reaching peak current at maximum dwell time. I replaced the spark plugs(worn out) now it won't start and codes are gone. Battery went low but not below 10 volts. Does anyone know if cam or crank sensor would cause this or is the coil pack bad ? Any help would be appreciated. Replaced $100.00 coil pack which tested bad but still won't start-------------any ideas? pcm is $650.00 I'm not chancing that unless it's the only option.

Edited by 36ply, July 21, 2004 at 12:11 am.