Engine running on sometimes

tonydgray · Feb 23rd, 2011, 15:51

Hi all

A handful of times now the engine in my 145 has run on a little after turning it off. This does not happen every time and has only happened a few times but I thought it would be worth a post to see the most likely causes.

Thanks

Tony

Snowman · Feb 23rd, 2011, 16:14

Hi Tony

Mine got particularly bad after we had modded the engine. Get the timing right to stop immediately but a bit down on power, timing optimised for the engine, then runs on!

Ended up fitting one of these which does the job. Moss sell them as often a problem with MG's.

Duncan

john h · Feb 23rd, 2011, 17:44

Pardon my ignorance, but what is it Duncan?

John

Snowman · Feb 23rd, 2011, 19:39

Sorry John, was in a hurry! It's an anti run-on valve.

To quote the user guide,

"When the engine is switched off, the anti run on valve is opened thus allowing an extra volume of air to be drawn directly into the
inlet manifold. This extra volume of air dilutes the normal fuel/air mixture in the manifold which should prevent the engine running on"

It is of course, just another toy.....but I like toys! Connected to the servo vacuum pipe by a T and one simple electrical connection.

Duncan

S60D5-185 · Feb 24th, 2011, 08:41

Quote:

Originally Posted by john h

Pardon my ignorance, but what is it Duncan?

John

They are also known as an anti dieseling valve.

Darryl

tonydgray · Feb 25th, 2011, 23:05

Thanks guys I am going to look into one of those to check out how much they are. I have also read somewhere else then the mixture could be too lean so also going to get it to the tuners and I not experienced enough to tune it myself really.

Thanks again

Tony

Feb 23rd, 2011, 15:51	#1
tonydgray Member Last Online: Feb 19th, 2024 11:19 Join Date: Sep 2010 Location: Atworth	Engine running on sometimes Hi all A handful of times now the engine in my 145 has run on a little after turning it off. This does not happen every time and has only happened a few times but I thought it would be worth a post to see the most likely causes. Thanks Tony

Feb 23rd, 2011, 17:44	#3
john h VOC Member Last Online: May 9th, 2024 17:34 Join Date: Jan 2007 Location: Huddersfield View Photos By: john h	Pardon my ignorance, but what is it Duncan? John __________________ XX

Feb 23rd, 2011, 19:39	#4
Snowman never knowingly slow Last Online: Aug 8th, 2012 09:31 Join Date: Nov 2006 Location: near Bath	Sorry John, was in a hurry! It's an anti run-on valve. To quote the user guide, "When the engine is switched off, the anti run on valve is opened thus allowing an extra volume of air to be drawn directly into the inlet manifold. This extra volume of air dilutes the normal fuel/air mixture in the manifold which should prevent the engine running on" It is of course, just another toy.....but I like toys! Connected to the servo vacuum pipe by a T and one simple electrical connection. Duncan

Feb 25th, 2011, 23:05	#6
tonydgray Member Last Online: Feb 19th, 2024 11:19 Join Date: Sep 2010 Location: Atworth	Thanks guys I am going to look into one of those to check out how much they are. I have also read somewhere else then the mixture could be too lean so also going to get it to the tuners and I not experienced enough to tune it myself really. Thanks again Tony

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