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      12-17-2012, 02:24 PM   #1
chriz1
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Engine hunting when cold (vid)

Hi guys engine has started to rev up and down on its own looking for some advice on what this maybe it only just started doing it and only does it from cold when warm revs are fine, car drives fine otherwise.its a 320d m sport lci


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      12-18-2012, 03:24 AM   #2
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I'd say it was the glow plug controller, mine has started doing it too, but I need to find if it's one, several glow plugs, or the controller, so you might want to have the codes read.

The controller is about 100, and each glow plug is about 19 plus VAT

Mine only does it when it's 5C~ or below - is yours the same?

Last edited by coopersim; 12-18-2012 at 03:39 AM. Reason: Removing link to video
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      12-18-2012, 03:28 AM   #3
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Mine doesn't always do it, when it was really cold the other day -3 it was fine I actually just noticed it last night.
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      12-18-2012, 03:36 AM   #4
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Doesn't sound like the glow plug controller then, maybe get the codes read
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      12-18-2012, 03:38 AM   #5
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No codes showin as I checked with my scangauge 2, not sure why it could be unless its the idle control vavle or maf early stages of failing, will let it develop I think.
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      12-18-2012, 02:38 PM   #6
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In past hunting engine at idle was signs of swirl flaps about the fail. I would get the car read is it under warranty still. Lets hope its an easy fix
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      12-18-2012, 02:40 PM   #7
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Hi no as its a 58plate, did it again tonight I blipped the throttle a tiny bit and let it idle again and it was fine, when warm its gone
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      12-19-2012, 03:39 AM   #8
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it could be number of things my merc recently started to do this as well. Going to get it booked in after xmas to get it checked out. If you have a indie local to you get the codes read to be safe
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      12-19-2012, 08:05 AM   #9
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I've read the codes myself with a sacangauge 2 nothing there, been reading online and there's a few threads Saying this is completely normal
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      12-19-2012, 09:36 AM   #10
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It could be which is scanguage as I know my code reader doesnt read all codes only ones that give engine light so you still could have temp fault codes
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      12-19-2012, 03:06 PM   #11
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It's one of these mate
http://m.scangauge2.co.uk/product.ph...&prod=LLU-0001
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      12-19-2012, 03:30 PM   #12
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Looks good in theory should read codes but in past I've used number of readers and only then for codes to still be read unless using full coding software or the dealer machine
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      12-19-2012, 03:39 PM   #13
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I'm looking to getting inpa soon so will give it a scan when I get it
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