Dieseling is most commonly caused by incorrect timing
Chris "V"
http://www.xtremedefender.com
http://www.extremeforce.com
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>From: Tab Julius <tab@penworks.com>
>To: "Steve Conley" <swconley@foxinternet.net>
>Cc: "Skye Poier" <skye@ffwd.com>, "MG LIST" <mgs@autox.team.net>
>Subject: RE: What causes "shutoff shudder"?
>Date: Wed, Nov 10, 1999, 8:25 AM
>
>
>Thanks to all - I've had a number of suggestions, a few have narrowed down
>to this valve, which I will check, but all are good ideas.
>
>- Tab
>
>
>At 10:37 PM 11/9/99 -0800, Steve Conley wrote:
>>The '73-80 models of B have the anti-run on valve. When you (not you Skye!)
>>turn off the engine, you should hear an audible click from the valve
>>kicking-in. It is located on the passenger side of engine compartment by the
>>carbon cannister. My '76 had a short period where it would diesel a bit and
>>it went away as quickly and mysteriously as it appeared. I just shrugged my
>>shoulders and didn't try to figure it out!
>>
>> Giving money and power to government is like giving whiskey and car keys
>>to teenage boys. -(PJ O'Rourke)
>>
>>Steve Conley
>>Marysville, WA USA
>>'76 MGB Roadster
>>GHN5UG393585G
>>mailto:swconley@foxinternet.net
>>MGB Online = http://web3.foxinternet.net/swconley
>>
>>
>>
>>-----Original Message-----
>>From: owner-mgs@autox.team.net [mailto:owner-mgs@autox.team.net]On
>>Behalf Of Skye Poier
>>Sent: Tuesday, November 09, 1999 1:41 PM
>>To: Tab Julius
>>Cc: MG Nuts
>>Subject: Re: What causes "shutoff shudder"?
>>
>>
>>Word on the street is that Tab Julius said:
>>> Turning off my ignition, my 78B's engine will often give me a few shudders
>>> before it decides to shut off for good. This is an effect I remember
>>> fondly from other older manual, probably non-fuel-injected cars (most
>>> notably my long-gone yellow 72 beetle). Releasing the clutch (to a gear)
>>> causes it to shut off quicker (okay, stall).
>>
>>The common term for this is "deiseling" or "run-on". The engine is hot
>>enough
>>to continue to ignite air/fuel even though there is no spark. I
>>could be wrong, but I think your 78 should have an anti-runon valve..
>>the gulp valve?.. I don't know a lot about the emissions systems on
>>later cars.
>>
>>Skye
>>
>>--
>>1966 MGB - GHN3L Safety Fast! __,__\__
>>The MGB Experience http://www.mgb.bc.ca/ (_o____o_)
>>
>>
>>
>
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