okay my car starts sputtering under load , full throtte and from a stop . so i change wires and gap my plugs they are new NGK-Gpowers..

also last week the car ran mint so this seems to be a off and on thing with it missing .

so i get a code reader and pull these = ( PO301-PO302-PO303-PO305 ) missing in cyl 1235
and codes PO420 i think is bank 1 o2 , PO402 EGR flow excessive

what else could cause my missing other then the coil .

and the EGR what does this mean? is it any thing to worry about ? .

thanks for any help

96 sport 5spd = mild modd 2003 Nissan 350z track pack vortch S/C 467rwhp http://www.cardomain.com/id/tsidsm