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        General >> Problems >> Lumpy/rough idle when hot after a day.
        
(Message started by: Butterfingers on Sep 3^rd, 2006, 12:30pm)

Title: Lumpy/rough idle when hot after a day.
Post by Butterfingers on Sep 3^rd, 2006, 12:30pm

If I leave my Scorpio for a day and don't drive it, I notice that the idle goes rough when the engine heats up. It's fine when the engine is cold though. It doesn't seem to affect the gear changes however, that is still quite smooth. After stopping for a while the problem gradually dissappers with the engine still hot. If I drive it every day there is no real problem.

But problem only occurs when it has been standing for a day or more and then I get rough idling when the engine heats up.

Thanks.

Any ideas please. Its a 2.3 Ultima auto.

Title: Re: Lumpy/rough idle when hot after a day.
Post by Octavian_P on Sep 4^th, 2006, 8:58am

Maybe the IACV is sticking, i also have a 2.3 (manual)...and had similar problems.....it sorted out by geting the IACV out, cleaning it with lots of carb cleaner, and then a few drips of oil on the interior shaft (do not use WD40 in this case !!), now it idles smooth as silk.

http://www.fordscorpio.co.uk/iacvdata.htm

Title: Re: Lumpy/rough idle when hot after a day.
Post by Butterfingers on Sep 5^th, 2006, 8:22pm

Thanks, whereabouts is the IAVC located?

Title: Re: Lumpy/rough idle when hot after a day.
Post by Simmo on Sep 5^th, 2006, 8:33pm

Here (http://www.fordscorpio.co.uk/16vcomponents.htm) and This (http://www.fordscorpio.co.uk/iacvdata.htm)