E91 325d Rough Start Up

seamaster · 12-26-2012, 01:50 PM

I have a problem with cold starts at cold ambient temperatures, the car is very rough as if running on less cylinders than the six it's got. This lasts for upto six seconds before normal smooth running resumes. No other issues manifest them selves.
The glow plug light seams to work if the ignition is turned on and left for a short time and the engine is not started.
The rev counter does not pulse during the rough running it shows reduced revs and the the revs pick up and everything is smooth.
Any ideas?

coopersim · 12-26-2012, 03:25 PM

Sounds just like my problem (glow plug/controller)

http://www.e90post.com/forums/showthread.php?t=779140

Interesting how many of these are popping up recently, apparently the soldering goes brittle on the glow plug controller PCB

seamaster · 02-12-2013, 03:02 AM

Turned out to be the glow plugs, plug 3 and 6 had failed.

coopersim · 02-12-2013, 05:39 AM

Did you have a crack at it yourself? Did you replace all the glowplugs?

savgeax · 02-12-2013, 11:03 AM

Do you think my bmw warranty will cover this?

coopersim · 02-12-2013, 12:53 PM

If it's got warranty then I'd say yes, definitely

Ant-E90msport · 02-13-2013, 03:22 AM

I'm experiencing these same problems, rough idle on cold mornings for 5-10 seconds on startup. Also a few mornings ago went to start it, it turned over/cranked but didn't start and a yellow ! was displayed along with the little engine management light. I took key fob out then re-tried and started normal

. I've got it booked in at dealers next Friday, still under AUC Warranty so I will report back then.

Ant-E90msport · 02-22-2013, 07:55 AM

Ok so back from dealers today, Passed MOT flying colours no advisories

but......

Found fault on cylinders 4 & 5 glowplug. They need to have it in for a few days to have the cylinder head off and check wiring to glowplugs etc. Booked in for Thurs next week, will update then. Still under AUC warranty thank god

Dr Dave · 02-22-2013, 02:07 PM

Quote:

Originally Posted by Ant-E90msport

Found fault on cylinders 4 & 5 glowplug. They need to have it in for a few days to have the cylinder head off and check wiring to glowplugs etc.

Eh??? Cylinder head off to check/change glowplugs??

I think someone's been telling you porkies......

mistryn · 02-22-2013, 02:15 PM

unless you mean inlet manifold?

Dr Dave · 02-22-2013, 02:31 PM

Quote:

Originally Posted by mistryn

unless you mean inlet manifold?

It's gotta be hasn't it?

Two days though............

Ant-E90msport · 02-23-2013, 01:46 AM

Sorry my mistake, yes manifold off not cylinder head

. But they said they want it for a couple of days and need to order parts. I'd guess glow plugs & possible control unit ???? . Hope it's not in for too long not keen on the 320d loaner, miss my sports seats and 6 cylinder growl.

Ant-E90msport · 03-01-2013, 10:27 AM

Ok quick update, Car went in Wed eve 5pm, expecting them to have it all weekend. got a call Thurs midday car all ready. They replaced glow plugs on cylinder 4 and 5. I also asked them to check the thermostats due to low mpg. They said they are functioning correctly. and the faults on the glow plugs would be the reason for the drop in economy. yet on the 16 mile A road drive home nothing above 60 i couldnt better 32.8mpg on the obc (reset 300 miles ago). so time will tell.

savgeax · 03-16-2013, 06:38 PM

Still getting the rough startup on my 325d. Car is booked in for Monday to see if they can spot the problem. No dash warning lights so I hope they can find the problem.

savgeax · 03-19-2013, 05:26 AM

Dealer just called. Cannot find any issues with the car and diagnostics does not show any issues. They are going to try it again this afternoon. Bugger!!

savgeax · 12-28-2013, 08:41 AM

It's back again.

Summer driving and no problems. Get to winter and the car for the first 5 mins is lumpy. As you pull away the car feels like it's jerking every 5 seconds or so. Give it 5 mins and the problem has gone. But more noticeable on acceleration rather than cruising.

Bmw had it last year and could not detect the problem and plugged in diagnostics. But it's fine in the summer.

Any ideas?

ukbeemerboy · 12-28-2013, 10:50 AM

Quote:

Originally Posted by savgeax

It's back again.

Summer driving and no problems. Get to winter and the car for the first 5 mins is lumpy. As you pull away the car feels like it's jerking every 5 seconds or so. Give it 5 mins and the problem has gone. But more noticeable on acceleration rather than cruising.

Bmw had it last year and could not detect the problem and plugged in diagnostics. But it's fine in the summer.

Any ideas?

I had this with mine earlier on in the year. It was fixed with a software update, it's been fine ever since....

12-26-2012, 01:50 PM	#1
seamaster Private 4 Rep 58 Posts Drives: E91 325d SE Join Date: Jul 2010 Location: Dorsetshire iTrader: (0)	E91 325d Rough Start Up I have a problem with cold starts at cold ambient temperatures, the car is very rough as if running on less cylinders than the six it's got. This lasts for upto six seconds before normal smooth running resumes. No other issues manifest them selves. The glow plug light seams to work if the ignition is turned on and left for a short time and the engine is not started. The rev counter does not pulse during the rough running it shows reduced revs and the the revs pick up and everything is smooth. Any ideas? Last edited by seamaster; 12-26-2012 at 02:01 PM..
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12-26-2012, 03:25 PM	#2
coopersim Captain 75 Rep 879 Posts Drives: 420d Join Date: Apr 2009 Location: Glos. iTrader: (2)	Sounds just like my problem (glow plug/controller) http://www.e90post.com/forums/showthread.php?t=779140 Interesting how many of these are popping up recently, apparently the soldering goes brittle on the glow plug controller PCB Last edited by coopersim; 12-26-2012 at 03:30 PM..
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02-12-2013, 03:02 AM	#3
seamaster Private 4 Rep 58 Posts Drives: E91 325d SE Join Date: Jul 2010 Location: Dorsetshire iTrader: (0)	Turned out to be the glow plugs, plug 3 and 6 had failed.
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02-12-2013, 05:39 AM	#4
coopersim Captain 75 Rep 879 Posts Drives: 420d Join Date: Apr 2009 Location: Glos. iTrader: (2)	Did you have a crack at it yourself? Did you replace all the glowplugs?
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02-12-2013, 11:03 AM	#5
savgeax Second Lieutenant 41 Rep 255 Posts Drives: 840i M Sport Join Date: Sep 2012 Location: UK iTrader: (0)	Do you think my bmw warranty will cover this?
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02-12-2013, 12:53 PM	#6
coopersim Captain 75 Rep 879 Posts Drives: 420d Join Date: Apr 2009 Location: Glos. iTrader: (2)	If it's got warranty then I'd say yes, definitely
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02-13-2013, 03:22 AM	#7
Ant-E90msport New Member 3 Rep 19 Posts Drives: E90 325d Black Sapphire Join Date: Aug 2010 Location: Lincolnshire iTrader: (0)	I'm experiencing these same problems, rough idle on cold mornings for 5-10 seconds on startup. Also a few mornings ago went to start it, it turned over/cranked but didn't start and a yellow ! was displayed along with the little engine management light. I took key fob out then re-tried and started normal . I've got it booked in at dealers next Friday, still under AUC Warranty so I will report back then.
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02-22-2013, 07:55 AM	#8
Ant-E90msport New Member 3 Rep 19 Posts Drives: E90 325d Black Sapphire Join Date: Aug 2010 Location: Lincolnshire iTrader: (0)	Ok so back from dealers today, Passed MOT flying colours no advisories but...... Found fault on cylinders 4 & 5 glowplug. They need to have it in for a few days to have the cylinder head off and check wiring to glowplugs etc. Booked in for Thurs next week, will update then. Still under AUC warranty thank god
	Appreciate 0 Quote

02-22-2013, 02:15 PM	#10
mistryn Colonel 147 Rep 2,048 Posts Drives: BMW 335D Join Date: Oct 2011 Location: Mids iTrader: (8)	unless you mean inlet manifold?
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02-23-2013, 01:46 AM	#12
Ant-E90msport New Member 3 Rep 19 Posts Drives: E90 325d Black Sapphire Join Date: Aug 2010 Location: Lincolnshire iTrader: (0)	Sorry my mistake, yes manifold off not cylinder head. But they said they want it for a couple of days and need to order parts. I'd guess glow plugs & possible control unit ???? . Hope it's not in for too long not keen on the 320d loaner, miss my sports seats and 6 cylinder growl.
	Appreciate 0 Quote

03-01-2013, 10:27 AM	#13
Ant-E90msport New Member 3 Rep 19 Posts Drives: E90 325d Black Sapphire Join Date: Aug 2010 Location: Lincolnshire iTrader: (0)	Ok quick update, Car went in Wed eve 5pm, expecting them to have it all weekend. got a call Thurs midday car all ready. They replaced glow plugs on cylinder 4 and 5. I also asked them to check the thermostats due to low mpg. They said they are functioning correctly. and the faults on the glow plugs would be the reason for the drop in economy. yet on the 16 mile A road drive home nothing above 60 i couldnt better 32.8mpg on the obc (reset 300 miles ago). so time will tell.
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03-16-2013, 06:38 PM	#14
savgeax Second Lieutenant 41 Rep 255 Posts Drives: 840i M Sport Join Date: Sep 2012 Location: UK iTrader: (0)	Still getting the rough startup on my 325d. Car is booked in for Monday to see if they can spot the problem. No dash warning lights so I hope they can find the problem.
	Appreciate 0 Quote

03-19-2013, 05:26 AM	#15
savgeax Second Lieutenant 41 Rep 255 Posts Drives: 840i M Sport Join Date: Sep 2012 Location: UK iTrader: (0)	Dealer just called. Cannot find any issues with the car and diagnostics does not show any issues. They are going to try it again this afternoon. Bugger!!
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12-28-2013, 08:41 AM	#16
savgeax Second Lieutenant 41 Rep 255 Posts Drives: 840i M Sport Join Date: Sep 2012 Location: UK iTrader: (0)	It's back again. Summer driving and no problems. Get to winter and the car for the first 5 mins is lumpy. As you pull away the car feels like it's jerking every 5 seconds or so. Give it 5 mins and the problem has gone. But more noticeable on acceleration rather than cruising. Bmw had it last year and could not detect the problem and plugged in diagnostics. But it's fine in the summer. Any ideas? __________________ NOW: BMW 840i Coupe PREVIOUSLY: 2018 Audi A5 Sportback, BMW F30 330D M Sport, F10 520d M Sport, E92 325D M Sport, E60 520d M Sport.
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