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Date: Wed, 06 Oct 2004 21:08:29 +0100
From: Grunff <>
Subject: Re: Slight run-on after turning the car off

Paul Halliday wrote: > My car is an '89 model C900 T8. > > It's had a service recently and feels great, but sometimes (usually the > colder days) and running 98 RON petrol (I usually run 97 RON supermarket > SUL) I get a slight run-on when the engine has been shut off. > > This evening, I had a little trouble staring the car (warm start) and had to > give it a couple of attempts and quite a bit of throttle. Flooded on the > first attempt? > > I'm inclined to continue using the 98 RON in preference to the normal 97 > RON, since it actually makes a difference after this last service! What is > causing the run-on - is the fuelling too rich? Bear in mind I have the CIS > system, should I lean it off slightly? My battery is in very good condition > an my ignition electricals are mostly less than a week old :) > > Your advice and comment, as always, is very appreciated. Hi Paul, Could be running rich, so leading to a little coking on the cylinder head which can cause run-on. Could also be wrong temperature plugs (too cool) getting coked. Pull the plugs and take a look. What are they like? -- Grunff

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