N54 Rough idle issue

RafaczE92 · 01-13-2020, 05:23 AM

Have already replaced the valve cover, along with new eldor coils and Bosch OEM spark plugs. Walnut blast has already been completed. Vanos solenoids were cleaned with new gaskets installed.
What else can it possibly be? Really hoping it isn't the injectors as I don't want to drop 1350$ on new ones.

mweisdorfer · 01-13-2020, 05:34 AM

Quote:

Originally Posted by RafaczE92

Have already replaced the valve cover, along with new eldor coils and Bosch OEM spark plugs. Walnut blast has already been completed. Vanos solenoids were cleaned with new gaskets installed.
What else can it possibly be? Really hoping it isn't the injectors as I don't want to drop 1350$ on new ones.

Check your electrical connectors & vac hoses

RafaczE92 · 01-13-2020, 05:35 AM

Quote:

Originally Posted by mweisdorfer

Quote:

Originally Posted by RafaczE92

Have already replaced the valve cover, along with new eldor coils and Bosch OEM spark plugs. Walnut blast has already been completed. Vanos solenoids were cleaned with new gaskets installed.
What else can it possibly be? Really hoping it isn't the injectors as I don't want to drop 1350$ on new ones.

Check your electrical connectors & vac hoses

Quote:

Originally Posted by mweisdorfer

Quote:

Originally Posted by RafaczE92

Have already replaced the valve cover, along with new eldor coils and Bosch OEM spark plugs. Walnut blast has already been completed. Vanos solenoids were cleaned with new gaskets installed.
What else can it possibly be? Really hoping it isn't the injectors as I don't want to drop 1350$ on new ones.

Check your electrical connectors & vac hoses

I actually forgot to mention that the rough idle is a sharp shake every 15-20 seconds.

iqraceworks · 01-13-2020, 07:48 AM

Drive your car around......and then park it for the night. In the morning (before you start it)....pull each spark plug out. If any of the plugs are wet with fuel, or even smell like gasoline.......you have a leaky injector in that cylinder.

My car had that rough idle when I first got it. Pulled the plugs after letting the car sit all night and found one wet with fuel. Put a new injector in......fixed the idle issue. All is good 👍

Oh.....and you don't have to replace all of the injectors...just the one(s) that are leaking.

mweisdorfer · 01-13-2020, 10:55 AM

Quote:

Originally Posted by RafaczE92

Quote:

Originally Posted by mweisdorfer

Quote:

Originally Posted by RafaczE92

Have already replaced the valve cover, along with new eldor coils and Bosch OEM spark plugs. Walnut blast has already been completed. Vanos solenoids were cleaned with new gaskets installed.
What else can it possibly be? Really hoping it isn't the injectors as I don't want to drop 1350$ on new ones.

Check your electrical connectors & vac hoses

Quote:

Originally Posted by mweisdorfer

Quote:

Originally Posted by RafaczE92

Have already replaced the valve cover, along with new eldor coils and Bosch OEM spark plugs. Walnut blast has already been completed. Vanos solenoids were cleaned with new gaskets installed.
What else can it possibly be? Really hoping it isn't the injectors as I don't want to drop 1350$ on new ones.

Check your electrical connectors & vac hoses

I actually forgot to mention that the rough idle is a sharp shake every 15-20 seconds.

Check the vacuum line on the throttle body

01-13-2020, 05:23 AM	#1
RafaczE92 Registered 0 Rep 3 Posts Drives: e92 335i xDrive Coupe Join Date: Jan 2020 Location: Chicago iTrader: (0)	N54 Rough idle issue Have already replaced the valve cover, along with new eldor coils and Bosch OEM spark plugs. Walnut blast has already been completed. Vanos solenoids were cleaned with new gaskets installed. What else can it possibly be? Really hoping it isn't the injectors as I don't want to drop 1350$ on new ones.
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01-13-2020, 07:48 AM	#4
iqraceworks Brigadier General 2068 Rep 3,792 Posts Drives: 2007 335i Join Date: Aug 2019 Location: Missouri iTrader: (0)	Drive your car around......and then park it for the night. In the morning (before you start it)....pull each spark plug out. If any of the plugs are wet with fuel, or even smell like gasoline.......you have a leaky injector in that cylinder. My car had that rough idle when I first got it. Pulled the plugs after letting the car sit all night and found one wet with fuel. Put a new injector in......fixed the idle issue. All is good 👍 Oh.....and you don't have to replace all of the injectors...just the one(s) that are leaking.
	Appreciate 0 Quote