[Healeys] The single most confusing engine shutdown problem ever!

[Michael Salter]

With all due respects Tom this sounds like the perfect situation where my
favorite adage applies.
"*Diagnosis BEFORE repair"*.
The repair system, usually adhered to in dealerships,  of "throw parts at
it until the problem is resolved" is the corolary of that process.
Some questions:
1. When the engine stops have you check for spark at a plug lead?
2. When the engine stops have you checked for fuel delivery at the
carburetors?
3. When you attempt a restart does the cranking sound normal?
4. Does the engine restart after everything cools down?
Almost certainly you will get the wrong answer to one of the above
questions (very unlikely more than one) and then you have something to
direct your attention to.

M



On Sun., Sep. 17, 2023, 11:17 a.m. Tom Felts via Healeys, <
healeys at autox.team.net> wrote:

> Was our driving a while back, engine purring, and suddenly she shut down.
> Let it sit for a while and she would start and run for a while--then shut
> down again.  I tried many fixes which I will list below.  Several times
> after the fixes she went for miles and miles and I thought I had "fixed"
> it.  Nope-----yesterday----it was AAA tow time once again (3 times this
> year).
>
> The last 2 shutdown times came when she was idling waiting for a light or
> for a car to pass.
>
> So here is what I have tried:  * new coil  * new voltage regulator  * new
> fuel pump  * New ignition switch  * Blew out the fuel lines * pulled float
> bowls and cleaned them (no debris inside)  * Pulled the distributor plate
> out and cleaned and oiled it  * disconnected the wire leading from the
> battery cutoff switch to the coil. * bypassed the entire battery cutoff
> switch * replaced the Pertronix with a new one  * checked all the sparkplug
> wires to make sure they were on properly  *  replaced the distributor rotor
> *Replaced the distributor cap . * checked the small ground wire inside the
> distributor to make sure it was attached properly.
>
>  All this----and STILL o joy.  I'm really out of ideas at this point.  If
> anyone has any ideas for me to check please share them.
>
> Thanks
> Tom
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