Misfire
Quick check: pull the distributor cap and check the 4 contacts for the plug wires for deposits. It there, clean off the deposits. Clean the end of the rotor button. Check the spark plug wires for arching. Check the 4 plugs for damage. This may reveal the source of the misfire. Both my verts developed misfires and deposits on the distributor cap contacts were the problem.
Fix: replace plugs, ignition wires, distributor cap, and rotor. Misfires usually come from these sources.
Let us know the final outcome.
Quick check: pull the distributor cap and check the 4 contacts for the plug wires for deposits. It there, clean off the deposits. Clean the end of the rotor button. Check the spark plug wires for arching. Check the 4 plugs for damage. This may reveal the source of the misfire. Both my verts developed misfires and deposits on the distributor cap contacts were the problem.
Fix: replace plugs, ignition wires, distributor cap, and rotor. Misfires usually come from these sources.
Let us know the final outcome.