Anti run-on valve

Any Technical Queries? This is the place to ask/give advice.
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Joined: Thu Dec 27, 2007 5:57 pm

Anti run-on valve

Post by ERACanada » Wed Apr 01, 2015 2:41 am

It looks like my anti run-on valve appears to be faulty and was causing a vacuum leak. I've removed it for now and there doesn't seem to be an issue. It appears to be difficult to find a replacement. Are they necessary?


an old original
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Re: Anti run-on valve

Post by an old original » Fri Apr 03, 2015 6:56 am

I've run without one for many years, stuffed a bolt up the redundant pipe from the carb.
The only issue is when you've run upto temp and then stop for at least 10-15 mins, it can take a bit longer to start, 5 seconds of cranking as opposed to 1-2. Short stops, i.e. petrol stops, aren't a prob. All down to fuel evaporation I believe. As for running on, never been an issue.

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Re: Anti run-on valve

Post by arrian » Mon Apr 06, 2015 8:39 am

Hi, I've seen the same valve on a Rover 220. It was part of the emissions control (charcoal canister I think). I'm sure Rover would have used it on other cars too.

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