sam,
your description seems to say that missing occurs with rise in operating
temperature . possibility you are losing compression with rise in temp and
expansion of joints ( head gasket). have you checked the torque on the
headbolts? or for that matter on the spark plugs? when you pull the plugs
are any of them fouled and oily? have you checked compression in all the
cylinders (both hot and cold) ? with the radiator cap removed and the
engine running do you get exhaust gases bubbling in the coolant?
best of luck, mickey in phoenix ( where we know hot cars ) 53 TD mk II , 32
F3 Magna OTS, 67 MGBGT
----- Original Message -----
From: <yd3@nvc.net>
To: "Sam DeSalvo" <>
Cc: <mgs@autox.team.net>; "mgt" <>
Sent: Tuesday, July 25, 2006 9:18 AM
Subject: Re: MG misfire
> <<<Snip>>>
> My '52 MGTD Mark II runs fine on startup. After it warms to operating
> temp, it
> starts misfiring to the point where it stops running. I just installed a
> new
> coil, have rebuilt the head, adjusted the carbs, timing, points. Does
> anyone
> in MG land have a clue what the problem could be? Clogged exhaust?
> Distributor? Any ideas would be appreciated.
> Thanks,
> Sam
> TD
> <<<Snip>>>
> Most likely the problem is electrical.
>
> Could still be the coil. I've seen bad new ones. Make sure the coil is
> wired properly: CB goes to contact breaker if the system is still +
> ground.
>
> Replace the condesor again. I've seen bad new ones.
>
> Replace cap and rotor.
>
> Try hot wiring the ignition by running a wire directly from the battery
> to the coil. If that helps, there's resistance building up in the
> ignition system after it's on for a while and heat's up.
>
> Could also be heat perculation in the carbs. Insulate the fuel lines and
> add a heat shield.
>
> Does the engine miss at the normal 85C temp?
>
> Regards,
> Blake
>
;
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