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hchris

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  1. Colder spark plugs dissipate heat quicker from the combustion chamber; if the electrode is accumulating carbon this will lead to a glow plug effect leading to dieseling.
  2. Whilst you mentioned changing the plugs, have you considered trying colder heat range spark plugs ?
  3. Looks pretty good; Stoichometric ideal is around 13:1.
  4. Echoing marcapra, before disturbing the head I would be going in through the inner guard access panel, Get the side cover off and watch the valves as you hand turn it over, you might be able to get some free up stuff blasting in around the valve stems.
  5. Perhaps then you would rather take the engine apart ..... that's a bigger annoyance
  6. Have you considered just repositioning the plug wires to suit the firing order ?
  7. Also, any possibility the choke fast idle mechanism is holding the throttle open ?
  8. Maybe rotate the distributor a fraction and see if revs drop.
  9. Do as Matt H has said, set the scale to 4 cylinder. Why, because the meter is reading 4 impulses each revolution.
  10. Current running through the coil will make it hot (think electric bar radiator). If the points aren't opening, or, current is permanently going to ground somewhere else, then the coil will get excessively hot.
  11. Coil gets hot, hmm, are the points opening ?
  12. Yep, rebuild before it self destructs.
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