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Re: Dieselling

To: "Tyson Sherman" <>
Subject: Re: Dieselling
From: Graham McCann <>
Date: Thu, 04 Sep 1997 10:15:57 +1000
At 10:24 pm 2/9/97 -0500, Tyson Sherman wrote:
>Hi folks.  My 76 MGB decided to start dieselling (sp?)
>again today.  It hasn't done so since April, but in the
>past month it has done so 2.5 times.  
>The anti-run on valve clicks like it's supposed to.  So,
>what usually causes this?  It's partially de-smogged
>but all of the vacuum and related hoses to the charcoal
>canister are properly clamped.  So, what usually causes
>this annoying thing?  

If your idling speed is above 750rpm then that is a likely cause.  The
problem is caused from hot spots in the combustion chamber igniting any
fuel around.  If the idling is set high there is enough fuel/air able to be
sucked in to those hot spots to keep the engine running.

Hope this helps.


97 MGF

Graham McCann  Rivett, ACT. Australia
Phone/Fax: +61 2 62889055

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