i have a 99 series 2 and replaced the plugs and wires with magnacore wire and bosch platinum 4 plugs and it runs real rough do these plugs work? why is it running rough?

 

is it better than before you changed plugs and wires? Did you change them all at once or one at a time?

do you have a service manual? If it got worse after changing the plugs and wires, my bet is you have the wires crossed.....or possibly the plugs are gapped way wrong.....

Pilk