[Mgs] hot idle troubles

[Simon Matthews]

Maybe you still have a vacuum leak, but only when hot (something expands
and opens the leak). Or, are you driving with the choke out for the first 8
miles, thus masking the effects of the vacuum leak?

Simon

On Sat, Jul 7, 2012 at 1:19 PM, Aaron Whiteman <awhitema at panix.com> wrote:

> Now that the Winter that Would Not End has ended and Eastern Washington is
> seeing close to normal temps, I'm seeing some trouble with my car's idle.
>
> '75 MGB, retrofitted with SU HIF4 from a '73; carbs recently serviced by
> Brooklands British of Tacoma to fix a vacuum leak in the throttle bushings.
>
> Start up car, drive for 8 miles.  Every thing is good, traffic lights
> irritating to driver, but car runs normally.
> Stop to pick up some stuff.  Rest for a few minutes.
> Get back in car, drive to end of block, reach stop sign, car dies.
> .. car dies at all stops for the next few miles unless I give extra
> throttle.
> Drive 8 miles back home, all is good again.
> Stop for coffee.
> Get back in car, car dies at intersections once again.
>
> When it doesn't die, idle tickover is about 750rpm
>
> Otherwise it is running strongly, temp gauge reads dead center normal (I
> didn't confirm head temps with my infrared thermometer this time, but past
> checks indicate this is about 190 degrees), oil pressure normal at around
> 30psi at idle (65-75psi at speed).
>
> Is this something I just need to live with, or is there an easy fix that
> I'm
> overlooking?
>
> --
> Aaron
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