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Help...after 40k miles decided to get rid of the old plugs and wires. Went with the MTD wires. Now at idle I have a sopadic miss...maybe one hiccough every minute or so. Checked to ensure the wires were pushed securely onto the plugs and fuelrails. Can they scope it to see if a cylinder is misfiring? I realize it could be many things...help
Check to make sure no wire hit a header tube and got burnt. That happened to me and I found it was #7 by the brake booster was touching I could not tell by visual inspection until I removed it and saw the burn. Also check to make sure none of your plugs had the porcelin cracked somewhere. I have been through both of these things before when I had a problem like yours.