230F idle speed

Nicholas Lewin · Dec 31st, 2018, 12:29

...almost Happy New Year fellow 240ers! Two conundrums I face which I am having a problem resolving:

My 240 (2.3 Bosch LH2.4) generally idles around 1000 RPM up to 1500 RPM. Occasionally I can get it to idle at about 750 where it should be and I do this by flicking the ignition off and back on again. In very cold weather it seems more able to idle at the right speed and in warm weather less able to. Something is clearly not working correctly

There are no fault codes on the reader, the economy is reasonable (but clearly not going to be where it should be). It passed it's MOT last year by a country mile and it drives fine

It's had a new exhaust, Oxygen sensor, Idle Control Valve and the throttle has been correctly set up a few months ago

So why won't it idle at the right speed? I am wondering whether cleaning up the ECU electrical contacts might help, whether a new temperature sender might help and/or whether the MAF is at fault?

Anyone shed any light on this matter? I have also posted another (possibly related) conundrum... Thanks all! Nick

Dec 31st, 2018, 12:29	#1
Nicholas Lewin newish member Last Online: Nov 7th, 2020 23:35 Join Date: Jan 2016 Location: London	230F idle speed ...almost Happy New Year fellow 240ers! Two conundrums I face which I am having a problem resolving: My 240 (2.3 Bosch LH2.4) generally idles around 1000 RPM up to 1500 RPM. Occasionally I can get it to idle at about 750 where it should be and I do this by flicking the ignition off and back on again. In very cold weather it seems more able to idle at the right speed and in warm weather less able to. Something is clearly not working correctly There are no fault codes on the reader, the economy is reasonable (but clearly not going to be where it should be). It passed it's MOT last year by a country mile and it drives fine It's had a new exhaust, Oxygen sensor, Idle Control Valve and the throttle has been correctly set up a few months ago So why won't it idle at the right speed? I am wondering whether cleaning up the ECU electrical contacts might help, whether a new temperature sender might help and/or whether the MAF is at fault? Anyone shed any light on this matter? I have also posted another (possibly related) conundrum... Thanks all! Nick

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