My car recently started running rough. All I did was change the oil and removed and reinstalled one of the spark plug wires. I eventually replaced new plugs w/o avail. It appears I should replace one or all the resistor tips rather than replace the wires due to $$$. Can someone give me advice on how to do this? Do I really need a special tool? What parts do I order that need replacing?

thanks in advance....

__________________
sjsfiji

'87 W124 260E (DD)
98K orig. mi. @7/15
CLK 7-Spoke Forged Wheels
Neuspeed springs/Bilstein Sport
4/3 bump (F/R)

'97 993 Carrera
106K orig. mi.
Always driven like it's stolen