blazer skipping

[Kurt L]

i have a 2001 blazer with a 4.3 vortec 4 spd 5th gear over drive.i have replaced the distributer cap, rotor button,plugs.truck ran fine for quite awhile
then it started to skip evry now and then put it on the computer and said plug wire's were bad.so i replaced the wire's,ran fine for awhile now it's starting to skip again.[not all the time tho it's like intimite skip,some times it runs good with no problem then it skips again] mechanic that put it on computer says that it's a spark plug fouled out by the bad wires.can this happen?i'm old school not good with this new trucks.i've changed out the fuel filter also.it's driving me crazy this is wife's truck and our driver to take on road trips.hope to hear from some one that can help me with this.

[89 crew]

yes bad wires can cause spark plug failure. On my suburban if I get a cheap set of wires they will be arching out in 3000 miles. check the wires for arching again, put new plugs in.

[Kurt L]

thanks 89 crew my wife keps telling that i need to change them. but just put them in last yr but will do that.thanks again

[68C15]

when it does this what does the O2 data look like? if either trim goes up I would look for fuel problem, if they go down look for ignition. if no change I would look at PCM inputs (CKP)

[89 crew]

No problem man, hope it helps.