I have a rough idle but a rougher drive I changed spark plugs,cap, and rotor I have metal shavings in my distributor cap does this meen I have a bad distributor?
Try and see if the distributor shaft wiggles from side to side or seems loose. If its loose, plan on repacing the distributor with a reman unit for about $50-$75.
If the distributor seems to be OK, see the "Surging Idle Checklist for help with all your idle/stall problems. Everything you need to find and fix idle problems is in there.
The first two posts contain all the updates to the fixes. At last count there were 24 possible causes and fixes for surging idle/stall problems. I continue to update it as more people post fixes or ask questions.