delta royal 88

okay my best friend has an 1990 delta 88 royal i've put 3 sets of plugs and wires in the car this year. plugs are tan in color which means it burning good. the car after about 3 months will start jumping all. (miss fire) and is sloved by new plugs in wires. i am about to have to put another set on here in the next day or so but i want to fix what is causeing the plugs and wires to go bad. any help?

Uh, what kind of plugs if you say Bosch, thats the problem, junk!!

You may want to check the resistance of the coil windings. See the attached link for what they should be.

http://www.autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/15/c3/3d/0900823d8015c33d.jsp

Ron

nope they ac delco plugs sameband i've use in my ford truck