Idling variation

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Sat 21 Dec 2002 23:19
Idling variation - SteveH42
How much variation is normal at idle? My Yaris usually idles at 1500rpm or so when cold, but drops to what seems to be little over 600 when hot. It actually sounds rather rough when hot, but I assume this is because it's running as slow as practical. The only thing is, sometimes, but not often, it idles a bit faster when warm - up to about 1200. (This is taking a guess based on the tacho which has a very low resolution)

I sometimes find this a bit of a problem, as it's much harder to catch it on the bite when the engine is warm - I either end up revving it too much, or practically stalling it as on a short journey you get used to it idling high at first, then forget it gets slower once the engine has warmed up...
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Sun 22 Dec 2002 09:49
Idling variation - David Lacey
Do you have air conditioning?
MG-Rover Problems? forums.mg-rover.org/
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Sun 22 Dec 2002 13:23
Idling variation - SteveH42
No. It's a Yaris GLS. No difference in electrical load between cold and warm either.
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