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Damp starting issues?

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Hi all

Noticed for about a month now, that when starting from cold in damp, or frosty conditions, she is very lumpy and rough as old boots for about 10 - 15 secs before settling into a reasonable idle. Once it even cut out moments after firing in a very un-German manner!!!

She's fully serviced and runs and starts smooth all other times.......Is it just damp getting in, or is a known sinister issue?

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are you waiting for the amber coil light to go out before turning the key?

despite bollocking the missus every time,she still just turns the key and it does cough and splutter for a few seconds

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are you waiting for the amber coil light to go out before turning the key?

despite bollocking the missus every time,she still just turns the key and it does cough and splutter for a few seconds

wtf? doesn't it restrict startup if the glowplugs are preheating the engine?

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Hi

Sorry for delay in response to your comment regarding waiting for the Glow Plugs etc....

Yes, always have and always will! Problem seems to have no rhyme or reason, as sometimes does it if just cold, but not damp, and others perfectly fine???? Checked for all/any loose connections etc....

Have noticed my temperature lines arround the rev counter are taking ages to reduce and never less than 8 or 9 lines even after 3 hours fully loaded on a Mway??? Could all this be linked to a thermostat issue? Have noticed MPG a bit shit at 25 round town and struggle to top 30 on a run!

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One or more glowplugs knackered , mine was like that and changed all six ... massive improvement. Tested the old plugs and had 4 knackered

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Hi

Sorry for delay in response to your comment regarding waiting for the Glow Plugs etc....

Yes, always have and always will! Problem seems to have no rhyme or reason, as sometimes does it if just cold, but not damp, and others perfectly fine???? Checked for all/any loose connections etc....

Have noticed my temperature lines arround the rev counter are taking ages to reduce and never less than 8 or 9 lines even after 3 hours fully loaded on a Mway??? Could all this be linked to a thermostat issue? Have noticed MPG a bit shit at 25 round town and struggle to top 30 on a run!

Your thermostats are probably worn out. Check coolant temperature via menu 7 with www.scoopz.com/m5board/E60_Hidden_OBC_Instructions.pdf and if it doesn't get up to 80+ degrees within 5-6 miles of driving, they need replacing. Operating temperature should be close to 90 degrees. Properly working thermostats make a noticeable difference on mpg.

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