[Fot] TR6 hot start problems

[Glenn Franco]

Greg
As dumb or simple as it may sound, try switching your gas station.
I don't know where you live but the switch was on to winter blended 
fuels which would have a higher reed vapor pressure and more likely to 
boil or vapor lock.
I take car of more than a dozen guys cars here locally (Southeast 
Michigan) and haven't had much of an issue with the problem. About half 
of those. I have rebuilt the carbs, replaced the vacuum valves but kept 
the hot idle compensator's intact.
I have had fuel injected cars run into the same problems when the % 
alcohol content is too high.
Remember they add more alcohol as a cheaper way to raise octane on pump 
fuel.
Glenn



On 1/6/2013 10:31 AM, Greg & Alison Blake wrote:
> I've got a starting problem with the TR6 I care for.  The car starts great
> when cold but after a drive that gets the car up to temp I have an issue
> with the restart.  The hot start problem only occurs if I let the car sit
> for more than about 10 minutes.  Related things I have done to the car:
>
> Rebuilt the original carbs - byass and temp compensators are locked out
>
> New high torque starter
>
> New battery
>
> Rebuilt dist - problem persists with more or less advanced static timing.
> Currently have it set to where I do not get any detonation at load
>
> New radiator
>
> Removed core plugs and flushed engine - it sat for about 20 years before I
> got it
>
> I've done lots of other work but I think that is all that would be
> applicable to this particular problem.
>
> The car runs right below the halfway mark on the temp gauge and I measured
> that to be 175-180 F at the cap.
>
>   
>
> I've read that some of the Stromberg carbs have a problem of boiling the
> fuel out of the floats in conditions like this.  I pulled the dash pots last
> weekend when I had the hot start issue and did not see large amounts of fuel
> pooling at the throttle disk.  How would I diagnosis this condition and what
> are the solutions other than heat shield?  I'll try the coil next just on
> the chance that it is getting hot and not working as efficiently as it
> should when hot.  Other than that, I am out of ideas.
>
>   
>
> When I do get it to start after sitting about 10 minutes in cool weather, I
> usually have to hold the throttle about half way to the floor to get it
> going.  This is would leads me to believe it is carb related/too much fuel.
>
>   
>
> Thanks for your suggestions,
>
>   
>
> Greg
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