high idling speed.

[alchim]

when car is hot and you come up to a junction the car idles at about 1300 rpm for about 10 to 15 second then drops to 800 rpm could it be vacuum hose

[Goaty Bill]

alchim said:

when car is hot and you come up to a junction the car idles at about 1300 rpm for about 10 to 15 second then drops to 800 rpm could it be vacuum hose

If you are as old as me, and if you are more experienced with carburettors, the answer would invariably be 'yes'.

However, in this place and time, and assuming you are referring to the Love Of Your Life and not the Golf/Polo/whatever else is in the drive... it will likely be diagnosed as the idle stepping motor.
Apparently cleaning it works wonders.
Never touched mine personally. I just let the clutch out a tad on the very rare occasion it has done that. Sorts it on the spot.

All that said; there are a few very clever responders here that might have another area or two to look at just in case?

[alchim]

cheers for the info. where is the idle stepper located so that i can remove it to clean it.cheers al

Edited by alchim on Sunday 16th October 22:16

[dickythediver]

Hi, mine worked the other way round I read everywhere that the stepper motor should be cleaned every six months which I did. Now I get catapulted into every junction and have been told now that it is working O.K. It is on the offside of the plenum chamber at the back. Take a look at rv8r.co.uk there is a good reference to it there.