Hi all,
Lots of good suggestions about Misfiring on the frogeye. It turned out
to be a loose nut on the post in the dizzy that contains the the top
hat insulator. When I got in there I thought that the points spring
seemed soft , Aha I though, it was points bounce at high revs , I
found my magneto spanners and feelers (already set to 12 thou for
valves ) from where I left them the last time I touched an A series
engine about 10 years ago. Made a start, the earth wire looked good -
it was insulated not the shoelace type , condensor looked new then I
went to undo the nut for the points and found it loose . Tightened it
up and problem has gone away. I will check the valve clearance too
tho' as the previous owner had never heard of a torque wrench -
virtually every nut and bolt was loose on the car when I got it ,
including suspension - I thought I had got most of them - I hadn't
thought about looking in the engine or dizzy etc !
Had a nice 30 mile drive in the English countryside to celebrate and a
couple of pints of Guinness - weather was great didn't even have the
tonneau cover on - it drove well - now need to grease the front
suspension though !!
Cheers all, thanks for the advice .
Alan
Warwick UK
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-----Original Message-----
From: spridgets-bounces at autox.team.net
[mailto:spridgets-bounces at autox.team.net] On Behalf Of Alan
Sent: Friday, July 01, 2011 3:28 PM
To: spridgets at autox.team.net
Subject: [Spridgets] Misfiring engine
Any thoughts on this ? I have some ideas but will listen to others !
Driving in torrential rain home from Midget 50 , engine started
misfiring at around 3500 rpm.hot.
I had fitted an RVC neg earth rev counter prior to the event and
drove there on motorway at 60mph aprox with two of us in the car and
soft top up. Snakeman Brad suggested removing last thing fitted prior
to the problem, the rev counter, so I did. With engine cold the misfire
is still there but at 4200 rpm with and without rev counter connected.
Another suggestion is the condensor - I will replace that now - but
my gut feeling is valve seat recession.
Any more ideas ? TIA
Alan Warwick UK
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