Car Won't Hold Idle

sle39lvr · 10-16-2018, 09:06 PM

E90/328i/130k miles

First, the car won't crank at all.

Battery was replaced - Link
BT Tool - Reset Battery Adaptation

Still won't crank!

Replaced the Starter motor - Link
Installation went fine

Car started snappily.
Engine started shaking and the idle could not be maintained.
After few tries, engine just dies off after few seconds of trying to maintain idle

Got following codes:

Gearbox Control Unit

Code:

CF17:
Error will not cause a warning light
Error is currently present

CF1C:
Error will cause a warning light
Error is not currently present

Code:

Car Access System 3
A0B4:
Fault engine start starter
Error will not cause a warning light
Error is not currently present

Code:

Instrument cluster PL2
A559:
Clamp 30g_f cut off
Error will not cause a warning light
Error is not currently present

Video here: https://www.dropbox.com/s/6omvs1iv1o..._0241.mov?dl=0

UPDATE

I unplugged MAF sensor, and the car starts and holds idle, though it's rough idle.
During started motor installation, I sprayed MAF cleaner on it
I pulled it out just now and re-sprayed and wiped it with a cotton pad
MAF plugged in - Car stalls and dies
MAF unplugged - Car holds idle, though rough

So is the MAF gone? Or this could be due to a another breather hose lose from the starter motor installation?

robthewrench · 10-17-2018, 07:01 AM

It sounds like you probably have a vacuum leak from a disconnected or broken hose. I would start looking for that first because it is the lowest cost, easiest item to fix.

sle39lvr · 10-18-2018, 08:51 AM

So I started taking apart everything for intake manifold. I found out that the hose that plugs in to the side of the throttle body has been pulled off.

Everything is fine now

Thank you for the reply. Made me not order new MAF sensor, which wasn't the cause.

10-16-2018, 09:06 PM	#1
sle39lvr Captain 125 Rep 654 Posts Drives: 08 328i Join Date: Aug 2011 Location: United States iTrader: (3)	Car Won't Hold Idle E90/328i/130k miles First, the car won't crank at all. Battery was replaced - Link BT Tool - Reset Battery Adaptation Still won't crank! Replaced the Starter motor - Link Installation went fine Car started snappily. Engine started shaking and the idle could not be maintained. After few tries, engine just dies off after few seconds of trying to maintain idle Got following codes: Gearbox Control Unit Code: CF17: Error will not cause a warning light Error is currently present CF1C: Error will cause a warning light Error is not currently present Code: Car Access System 3 A0B4: Fault engine start starter Error will not cause a warning light Error is not currently present Code: Instrument cluster PL2 A559: Clamp 30g_f cut off Error will not cause a warning light Error is not currently present Video here: https://www.dropbox.com/s/6omvs1iv1o..._0241.mov?dl=0 UPDATE I unplugged MAF sensor, and the car starts and holds idle, though it's rough idle. During started motor installation, I sprayed MAF cleaner on it I pulled it out just now and re-sprayed and wiped it with a cotton pad MAF plugged in - Car stalls and dies MAF unplugged - Car holds idle, though rough So is the MAF gone? Or this could be due to a another breather hose lose from the starter motor installation? Last edited by sle39lvr; 10-16-2018 at 10:03 PM..
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10-17-2018, 07:01 AM	#2
robthewrench Captain 266 Rep 952 Posts Drives: 11 E90 335i Join Date: Aug 2014 Location: Columbus OH iTrader: (0)	It sounds like you probably have a vacuum leak from a disconnected or broken hose. I would start looking for that first because it is the lowest cost, easiest item to fix. __________________ bone stock
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10-18-2018, 08:51 AM	#3
sle39lvr Captain 125 Rep 654 Posts Drives: 08 328i Join Date: Aug 2011 Location: United States iTrader: (3)	So I started taking apart everything for intake manifold. I found out that the hose that plugs in to the side of the throttle body has been pulled off. Everything is fine now Thank you for the reply. Made me not order new MAF sensor, which wasn't the cause.
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