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Re: 76 TR6 Anti Run On Valve

To: TRIUMPHS@autox.team.net
Subject: Re: 76 TR6 Anti Run On Valve
From: Tim Gaines <mtgaines@cs1.presby.edu>
Date: Wed, 14 Jun 2000 18:23:18 -0400

><
>
>Blake,
>
>The function of the anti run on valve is to apply a partial vacuum to the
>float chamber of the carbs when you switch off the engine.  This vacuum
>sucks the petrol away from the jets starving the engine of gasoline and
>thus preventing dieseling.  It's interesting that they added this to the
>low compression cars when the high compression cars are the ones that need
>it!  Feel free to plug it up but if the car has a tendency to diesel you
>may consider reactivating it.
>
>Dave
>
>P.S. I've seen plenty of these valves with this port broken off.

Dave,

I've seen a few broken ones too, but one in particular got me
hopping mad.  About five years ago my Spit needed a new clutch.  It
was my daily driver and I just didn't have the time to tackle it, so
I took it to a new import repair place nearby.  When I got it back,
the OD wouldn't kick in, so I took it back and talked to the guy who
had worked on it.  He admitted that he hadn't reconnected the inhibitor
switch on top of the tranny.  He spent about 45 minutes with a mirror
and various long nosed pliers and managed to get things hooked up again.
He seemed like a nice guy, and I didn't think anything more about it.
However, a couple of months later I was trying to figure out why the
engine was deiseling, and I checked out the anti run-on valve.  I
found that the plastic port was broken off and that it had been concealed
by placing a screw head first into the hose and then placing the threaded
end into the port to hold the hose in place.  When I visited the garage
to complain . . . . . . they were closed up and out of business!

Tim

Tim Gaines
Clinton, SC
1980 Spitfire
1974 TR6



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