318d m sport lci hunting on idle

billyyoung · 12-21-2014, 02:51 AM

Right guy's my car has started to hunt on idle . This doesn't happen all the time only sometime's . The wife can drive it back from her wrok 20 mile away and it's fine . I can then go and get in it and it will start the rev's bounce up and down . You can give to throttle a bit of a rev to around 3k let it off and it will sit and idle fine . It still drive's as it did , there is also no fault shown on the dash . Car's only got 33k on it its a 59 plate .

Has anyone experienced this before ?

Thank's Billy

Len_Beach · 12-21-2014, 05:37 AM

Glow plug control unit would be most likely although 1 or more glow plugs could have gone as well.

INPA codes don't really pin it down.

I changed my control unit in my 330d LCI with a second hand one from eBay and the fault codes in INPA changed but the issue persists.

I'm now going to change all 6 glow plugs and the control unit together.

billyyoung · 12-21-2014, 09:51 AM

I'm not sure about it being glow plug related . The car starts fine hot or cold even on frosty morning's .

Sensible_ · 12-21-2014, 11:21 AM

What's your battery / alternator like? Checked voltage using hidden menu?

Maybe upload a video of exactly what symptoms you experiencing.

billyyoung · 12-21-2014, 03:04 PM

I'll video it the next time it happen's. It's more dodgy sensor that it won't happen regular. In the 3 or 4 time's I have used the car today , even with the start/stop on it has never done it.

12-21-2014, 02:51 AM	#1
billyyoung Private 4 Rep 55 Posts Drives: 318d m sport lci Join Date: Feb 2014 Location: dundee iTrader: (0)	318d m sport lci hunting on idle Right guy's my car has started to hunt on idle . This doesn't happen all the time only sometime's . The wife can drive it back from her wrok 20 mile away and it's fine . I can then go and get in it and it will start the rev's bounce up and down . You can give to throttle a bit of a rev to around 3k let it off and it will sit and idle fine . It still drive's as it did , there is also no fault shown on the dash . Car's only got 33k on it its a 59 plate . Has anyone experienced this before ? Thank's Billy
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12-21-2014, 05:37 AM	#2
Len_Beach Major 186 Rep 1,247 Posts Drives: 435d Join Date: Jun 2011 Location: UK iTrader: (1)	Glow plug control unit would be most likely although 1 or more glow plugs could have gone as well. INPA codes don't really pin it down. I changed my control unit in my 330d LCI with a second hand one from eBay and the fault codes in INPA changed but the issue persists. I'm now going to change all 6 glow plugs and the control unit together.
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12-21-2014, 09:51 AM	#3
billyyoung Private 4 Rep 55 Posts Drives: 318d m sport lci Join Date: Feb 2014 Location: dundee iTrader: (0)	I'm not sure about it being glow plug related . The car starts fine hot or cold even on frosty morning's .
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12-21-2014, 11:21 AM	#4
Sensible_ Colonel 529 Rep 2,504 Posts Drives: 2008 E90 Join Date: Feb 2012 Location: London iTrader: (1)	What's your battery / alternator like? Checked voltage using hidden menu? Maybe upload a video of exactly what symptoms you experiencing.
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12-21-2014, 03:04 PM	#5
billyyoung Private 4 Rep 55 Posts Drives: 318d m sport lci Join Date: Feb 2014 Location: dundee iTrader: (0)	I'll video it the next time it happen's. It's more dodgy sensor that it won't happen regular. In the 3 or 4 time's I have used the car today , even with the start/stop on it has never done it.
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