You might be surprised, and I've seen it before, engine seems to idle well, no obvious misfire, but there may be a wire crossed, CONFIRM the FIRING order, rotor location #1 under the cap, check the plug wire orientation


I purchased a vehicle from an ASE certified shop where the techs toiled for weeks trying to solve the "vibration" issues on a Dodge Ram,...after buying it I spent 5 minutes and found that the wires on two cylinders were misplaced on the firing order, this after the ASE techs replaced everything under the sun and were preparing to tear apart the drivetrain before deciding to take me up on my offer to buy it...sometimes it's the simplest things we over look