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

[Richard Collins]

Does it do it only in summer type warm weather ?
If so, I’d say vapor lock of fuel system.
Happens to me in the summer and predicted to happen when water temp on my instruments hit 200 degrees when stopped. Although I have wrapped insulation around the lines leading to the carbs close to the manifold which helped but has not cured the issue. I do have a heat shield but haven’t installed it.
So my cure is not to drive on hot days.

Regards,
Richard C
BN7 #440

On Sep 17, 2023, at 10:22, 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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