Carl Heideman
Carl Heideman
12/31/20 7:10 a.m.
  • Start by looking for problems–obvious or not. Ensure fresh spark plugs, spark plug wires and distributor cap.
  • Set spark plug gap to factory specifications.
  • Remove the points, condenser and the plates these attach to and inspect the advance mechanism. Twist the points cam to …

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sir_mike
sir_mike New Reader
5/25/21 10:58 a.m.

Two things you missed especially if British car...Lucas...Cheaper rotors will give problems and coils do fail to work properly.I had an issue...motor woud stumble like carb issue but saw tach going crazy.Changed coil and problem gone.

Torqued
Torqued New Reader
5/25/21 3:28 p.m.

Yes coils do fail.  I had an intermittent miss in my MGA that I couldn't seem to fix.  It seemed worst under load or in damp weather.  (Not real common in southern California, but it happens.)  Finally one dark evening I had the hood up with the engine idling and I could see the spark tracing down the coil tower.  There was a tiny hairline crack in the coil tower, barely visible but enough to conduct the spark at least part of the time.  A new coil eliminated the intermittent miss.

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