why is engine missing???

[tradrjeff]

I have a 2000 silverado with 92000 miles. I changed the plugs with new ACDelco plugs about 3 months back. I noticed the engine started missing and running a little bad when under a load like going up a hill. It has gotten some worse. I checked the gap of the plugs but that seems fine. What is my next course of action?
thanks
tradrjeff

[3mikeman]

Now try replacing your wires. My 99' did the same thing replaced both plugs and wires now runs like new.

[tradrjeff]

I was told that the wires were actually a coil wire and not traditional plug wires. I have looked online at Autozone and they don't list wires for a 2000 silverado. Any thoughts on this?

[wafrederick]

Stay away from AutoZone for plugwires,cheap and junk.Cheap plug wires are not the way to go.I know Carquest sells the plugwires,higher quality and are a lot better than AutoZone.Carquest plugwires are very good,the highest quality ones and you have to do it once.

[intel_guy]

The 4.8 (my engine) does not have a distributor, but it does have plugs and wires. Every plug has a wire that goes to it's own corresponding coil.