Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Morgan Misfire and lumpy running under load

Check the fuel filters to see if there is any sediment, I wouldn't be surprised of it was ignition.
Make sure the distributor hasn't slipped and the ignition timing is spot on.

Parts are so cheap on Xflow that it makes sense to just renew parts.

I had a similar issue in the past, after trying different coil, plugs, plug leads, changing back from electronic to points ignition.... it turned out to be the distributor cap!