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Topic: Bad Idling (Read 404 times) |
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pallieter1942
Newbie
 
Posts: 8
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I own a scorpio 2L automatic.Essence.
The idling is most of the time quite normal but However sometimes unexpectly on a traffic light or so the idling becomes very bad, going to from 1000 revs to 700.
when i switch the engine off and start it again the problem is over and the idling at 1000rev is perfect.
what can be the reason?
it seems like restarting the engine has the effect of a reset.
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Eric_R
Administrator
Cosworth Owner 1998 - 2006 & site co-founder
Posts: 1792
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Re: Bad Idling
« Reply #1 on: Feb 3rd, 2005, 12:15pm » |
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Look through http://www.fordscorpio.co.uk/pooridle.htm for some clues.
It sounds to me like you may have a sticking throttle plate - a hanging throttle. The butterfly valve sticks on gummy deposits inside the throttle body - turning the engine off and starting it again pulls the butterfly closed again.
Clean the inside of the throttle body with good carb cleaner and make sure the butterfly valve can move freely before you reassemble it - that should sort it. 
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After a Cosworth, anything else is just ... ordinary
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