I would still try a new sparkplug AND lead for no. 2. I had a similar
problem with my JH years ago in the late seventies on my holidays in
France for about a fortnight. Dismantled the whole chibang several
times, no luck and finally came to the conclusion that is was the plug
lead. I went to one of those small road side garages and asked for a
plug lead. He asked: for what car? I told him it was for a Jensen
Healey. He did not have any! I tried to explain that any thing of a
suitable length was OK but he still maintained that it would not work. I
then asked him if I could take a plug lead of one of the scrap 2-CV's
lying about in the yard. "OK, go ahead if you must, but it will not
work" . He was absolutely dumbfounded when the engine started up as
sweet as a nut. I was his knowledgeable hero of the day.
Kees Oudesluijs
Michael Salter schreef op 16-10-2014 20:24:
> I figure that if we can discuss the merits of various brands of GPS I can
> ask this question.
> I have been around British cars for about 50 years and worked on them
> professionally for 30 so I have a pretty good understanding of how to fix
> them..i.e. no obvious suggestions!!
> My daily driver (summer) is a 1967 Morris Mini Cooper S.
> It has recently developed a misfire on one cylinder..the problem sometimes
> goes away after driving for a couple of miles but not always.
> The engine runs both at idle and higher RPM on 3 cylinders...
> When I check the plugs #2 plug is wet and obviously not firing.
> Swap #4 & #2 plugs and the same cylinder, #2 still misfires and wets its
> plug.
> Compression test shows all cylinders even at about 160 p.s.i.
> Install a spark tester (gap) between the plug cap and the plug of #2
> cylinder and the engine runs, still on 3 cylinders, with a very healthy
> 3/4" spark showing in the tester. This to my mind eliminates almost any
> ignition problem as the likely cause.
> Both valves for #2 cylinder open and close a lot (649 cam).
> Checked the points cam and it opens correctly for all cylinders.
> Fitted a replacement distributor cap and rotor...no change.
> I'm starting to run out of ideas here..
> Disassembled both carbs, and checked the fuel supply and float float level
> on each.
> Now I'm really running out of ideas!!!! Help......
> Michael S
> BN1 #174
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