I have an intermittent starting problem, the engine starts fine when cold but can refuse to start when the engine has been running. Normally when the engine is properly hot but it can also happen after a five minute drive usually after it has been standing for ten minutes or so. Note it can happen on cool days 10-15'c so I don't think the problem is fuel starvation. However, a burst of volatile solvents in the air intake usually helps get the car going. The plugs look fine, gaps OK when I have taken them out during one of these episodes. I've done a minor carb overhaul which fixed another problem (I found, a sticking needle valve, wrong float level, leaking and missing gaskets between crankcase and carb). I also checked the fuel system, squeaky clean tank, good flow at the carb end, clean cup and gauze under the tank and the fuel when decanted into a jam jar is free of visible sediment. None of this seems to have helped the starting problem. I found a thread on a Dutch forum where the solution was to replace the coils and plug leads. This sounds like an idea to me because a) both items look like original equipment b) 2cvs suffer from hot starting problems when the coil is past its best. I'm not sure how points and/or timing could cause an intermittent fault but I guess these are worth checking. Any other possible things to check?