Engine not smooth while idle

Hotter · 07-15-2018, 03:36 PM

Hi, I have idle similar to this video:

Happens regardless engine during warm-up or after a long drive.
Does this mean ignition coil problem? Do I need to replace all 6 coils?

sportrider3000 · 08-09-2018, 09:58 PM

The same started on my car today (except of 5290 miles of distance-Lithuania)...

Jashan90 · 08-09-2018, 10:35 PM

Quote:

Originally Posted by Hotter

Hi, I have idle similar to this video:

Happens regardless engine during warm-up or after a long drive.
Does this mean ignition coil problem? Do I need to replace all 6 coils?

Shaft sensor.. if coils and sparks are good

nhhiep · 08-09-2018, 10:35 PM

before you do that. try to pour in bottle of BG 44K Fuel System Cleaner

e90yyc · 08-09-2018, 11:25 PM

As others have mentioned it could be a few things.

I had exact same symptoms. What worked for me was plugs first: this solved the problem for about 6 months. Then the problem returned, and I also started getting more pronounced misfires. Read codes, swapped coils, determined I had an issue so I replaced them all.

Problem is gone.

I’m sure my spark plugs weren’t actually to blame, but rather magnified the issue which in my case was caused by failing coil.

dublin14 · 08-11-2018, 07:26 AM

I had the same thing. Even on a cold start the car would slighty miss. I put in Royal Purple DI cleaner and the car runs perfect now. Ran two bottles in a row with 40L in each tank. 1000 miles since and no issues. 8 bucks... Fixed it. Try that first.

Hotter · 08-12-2018, 04:11 PM

Quote:

Originally Posted by dublin14

I had the same thing. Even on a cold start the car would slighty miss. I put in Royal Purple DI cleaner and the car runs perfect now. Ran two bottles in a row with 40L in each tank. 1000 miles since and no issues. 8 bucks... Fixed it. Try that first.

I don't think we have such in Lithuania, but I tried "STP Petrol Injector Cleaner (200 ml)", still the same idle. The issue is only on Idle. Car runs smooth when driving, only when stopped jumping starts, that cant be coils? If it would be coild it would jump always?

Also I scanned errors:

2F83 and 2F81 are there, what do they mean? could they be because of fuel injector cleaner? Or did I caught an issue?

07-15-2018, 03:36 PM	#1
Hotter First Lieutenant 72 Rep 381 Posts Drives: BMW E92 328i -> 330i Join Date: Feb 2018 Location: Lithuania iTrader: (0)	Engine not smooth while idle Hi, I have idle similar to this video: Happens regardless engine during warm-up or after a long drive. Does this mean ignition coil problem? Do I need to replace all 6 coils?
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08-09-2018, 09:58 PM	#2
sportrider3000 Private First Class 5 Rep 111 Posts Drives: E90 Join Date: Jun 2013 Location: PNW iTrader: (0) Garage List 2010 328I SEDAN [7.00]	same here The same started on my car today (except of 5290 miles of distance-Lithuania)...
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08-09-2018, 10:35 PM	#4
nhhiep Captain 88 Rep 863 Posts Drives: bmw Join Date: Jan 2006 Location: Denver, CO iTrader: (0)	before you do that. try to pour in bottle of BG 44K Fuel System Cleaner
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08-09-2018, 11:25 PM	#5
e90yyc Art Collector 2425 Rep 3,448 Posts Drives: 2007 328xi (GM-delete 6MT) Join Date: Feb 2018 Location: Canada iTrader: (0)	As others have mentioned it could be a few things. I had exact same symptoms. What worked for me was plugs first: this solved the problem for about 6 months. Then the problem returned, and I also started getting more pronounced misfires. Read codes, swapped coils, determined I had an issue so I replaced them all. Problem is gone. I’m sure my spark plugs weren’t actually to blame, but rather magnified the issue which in my case was caused by failing coil.
	Appreciate 0 Quote

08-11-2018, 07:26 AM	#6
dublin14 Banned 148 Rep 388 Posts Drives: Bmw 335i- F150 FX4- Audi A4 Join Date: Apr 2011 Location: Toronto-Canada iTrader: (0)	I had the same thing. Even on a cold start the car would slighty miss. I put in Royal Purple DI cleaner and the car runs perfect now. Ran two bottles in a row with 40L in each tank. 1000 miles since and no issues. 8 bucks... Fixed it. Try that first.
	Appreciate 0 Quote