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Engine Runon

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Rick O.

Rick O.

Jedi Trainee
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My TR6 will frequently runon briefly following shutdown and I know runon can be caused by over-advanced timing or carbon buildup in the heads. Can an improper carb mixture also contribute to the problem? Or is this a characteristic of the car (since the later TR's have a solenoid-activated shutoff valve on the bottom of the charcoal canister)? Thanks!
 
<blockquote><font size="1" face="Verdana, Arial">quote:</font><hr>Originally posted by Rick O.:
Or is this a characteristic of the car (since the later TR's have a solenoid-activated shutoff valve on the bottom of the charcoal canister)? <hr></blockquote>

Rick,
I believe you are correct because they installed the anti-run on valve on the later cars. I think we can take solace knowing that we all have the same situation and it seams to be a quirk of the cars. However, I do believe that the springs get stretched over 30 years and probably won't return back quickly enough.
I am coming to believe that the distributor weights and springs contribute to a lot of idle and bad running situations.
 
also, be sure idle speed is as low as possible
 
Hi Rick,

There was a discussion about this on another thread;
https://www.britishcarforum.com/cgi-bin/ultimatebb.cgi?ubb=get_topic&f=1&t=000922
Maybe you can find some help there.

It all boils down to; even small changes in idle mixture or speed, timing, or fuel octane, can affect it.

There is a rare occurance on some cars where the electrical system can cause run on, if you have an alternator & the wrong type of charge indicator circuit. This is not very likely though.
D
 
Webb,

Runon is when you turn your engine off yet it runs for a couple of seconds. It is an endearing or enraging quirk many triumphs tend to have.

Cheers,
thirsty.gif

Walter
 
Thanks for the leads. I'll try fiddling with fuel octane.
 
No more runon after blanking-off the bypass valves on the Strombergs.
 
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