ATTN people with rough idle, slow or jerky acceleration

e90pilot · 07-21-2011, 02:46 PM

Ok, there are many causes to these symptoms but I just wanted to add my $.02. I had all of the symptoms above in the title and it was caused by a broken PCV line. The car is normally supposed to detect leaks in the system, but sometimes it is still within parameters. A leaky PCV system can lead to a an air leak in the intake and cause the car to reduce power. It can also lead to rough idle. Just open up your oil filler cap with the engine running and the car will almost shut off and will not throw a code.

If you guys have tried injector cleaner, reprogramming, changing plugs etc and still have problems, have someone check the PCV lines. They are made of the absolute cheapest material you can get. After many heat cycles it just turns to flakes. Mine was spewing oil everywhere in the engine bay as well. It can also be very bad for your car as it will suck in moisture into your crank case.

benzo23 · 07-21-2011, 02:55 PM

whenever you get a chance can you take a picture of where these lines exactly are so i can go and check...it would be really helpful

c_jeong89 · 07-21-2011, 03:13 PM

Quote:

Originally Posted by benzo23

whenever you get a chance can you take a picture of where these lines exactly are so i can go and check...it would be really helpful

+1

e90pilot · 07-21-2011, 03:29 PM

I don't have a real pic because I have to remove the cabin air filter housing. Here's the exploded parts diagram.

http://www.realoem.com/bmw/showparts...38&hg=11&fg=15

Item 3 was the culprit in my car. It connects to the valve cover all the way in the back close to the firewall. It's extreamly annoying to get to.

gino58 · 07-21-2011, 03:36 PM

what's your mileage? is this easy to replace? i'm thinking of replacing this part at let's say 100K as preventive maintenance; anyway it only cost about $50

e90pilot · 07-21-2011, 03:57 PM

I've 164k and counting. And it is an extreme PITA to replace.

c_jeong89 · 07-21-2011, 04:05 PM

Quote:

Originally Posted by e90pilot

I've 164k and counting. And it is an extreme PITA to replace.

damn 164k miles....i like

Donia330i · 07-21-2011, 05:26 PM

Any other issues with that many miles?

e90pilot · 07-21-2011, 05:34 PM

Nothing major so far. The oil pan gasket, rear main seal, oil filter housing gasket, and pressure power steering are all leaking. Not spewing, just leaking. I had a coil pack die on me not that long ago. At 90k the diff died and at 5k the water pump died. Those are the only major problems I've had.

krnboy817 · 07-21-2011, 09:12 PM

my e92 is actually in service right now... and its been 2 days and no calls from SA stating what the issue is causing this. i believe benzo23 and i have been pretty active on the other thread that concerns the similar issue as this one.

i actually went to the dealership where my e92 is being serviced at and tried the engine start on 2 different (2008 and 2010) e92 328i... and surprisingly and disappointedly, they all did the same thing.

i can understand mine and the 2008 model having this issue with a broken or cracked part, but a new one shouldnt have done this. at that moment the SA had me convinced that its the character of our engine... but now im glad that i have something i can talk to the SA about and get him to check out on.

MaximusJ · 07-21-2011, 10:50 PM

I remember mike-y broking a line while swapping his intake manifold... Could it be that line?

fdriller9 · 07-21-2011, 11:28 PM

Quote:

Originally Posted by e90pilot

Nothing major so far. The oil pan gasket, rear main seal, oil filter housing gasket, and pressure power steering are all leaking. Not spewing, just leaking. I had a coil pack die on me not that long ago. At 90k the diff died and at 5k the water pump died. Those are the only major problems I've had.

I plan on swapping my oil filter housing gasket when I flush my coolant in the next couple weeks.

Do you know when about it started leaking?

e90pilot · 07-22-2011, 12:34 AM

Not really my engine bay was extremely dirty for a long time. It was only after I cleaned it that I saw the marks from the leak. Just take a look, if it's not leaking, don't change it out just yet. Also, if your PCV lines aren't broken, don't replace them prematurely. There is a lot of potential to break fragile things back there.

benzo23 · 07-22-2011, 09:38 AM

Quote:

Originally Posted by *********

I plan on swapping my oil filter housing gasket when I flush my coolant in the next couple weeks.

Do you know when about it started leaking?

My oil filter housing gasket started leaking at about 70k...

07-21-2011, 02:46 PM	#1
e90pilot Freight Dawg 105 Rep 2,103 Posts Drives: E90 325i Join Date: Jul 2005 Location: Oakland, CA iTrader: (3)	ATTN people with rough idle, slow or jerky acceleration Ok, there are many causes to these symptoms but I just wanted to add my $.02. I had all of the symptoms above in the title and it was caused by a broken PCV line. The car is normally supposed to detect leaks in the system, but sometimes it is still within parameters. A leaky PCV system can lead to a an air leak in the intake and cause the car to reduce power. It can also lead to rough idle. Just open up your oil filler cap with the engine running and the car will almost shut off and will not throw a code. If you guys have tried injector cleaner, reprogramming, changing plugs etc and still have problems, have someone check the PCV lines. They are made of the absolute cheapest material you can get. After many heat cycles it just turns to flakes. Mine was spewing oil everywhere in the engine bay as well. It can also be very bad for your car as it will suck in moisture into your crank case. __________________ --Marcelo '06 Arctic Metallic 325i \| Sport Package \| 6MT \| Dinan Stage III suspension \| Dinan exhaust \| 330i manifold swap! Click here! \| Active Autowerke tune \| 135i Brake Calipers \| Deiselboost caliper brackets \| E46 M3 front rotors
	Appreciate 0 Tweet Quote

07-21-2011, 02:55 PM	#2
benzo23 Colonel 74 Rep 2,848 Posts Drives: 14 F30 AW MSport Join Date: Apr 2010 Location: FL iTrader: (1)	whenever you get a chance can you take a picture of where these lines exactly are so i can go and check...it would be really helpful
	Appreciate 0 Quote

07-21-2011, 03:29 PM	#4
e90pilot Freight Dawg 105 Rep 2,103 Posts Drives: E90 325i Join Date: Jul 2005 Location: Oakland, CA iTrader: (3)	I don't have a real pic because I have to remove the cabin air filter housing. Here's the exploded parts diagram. http://www.realoem.com/bmw/showparts...38&hg=11&fg=15 Item 3 was the culprit in my car. It connects to the valve cover all the way in the back close to the firewall. It's extreamly annoying to get to. __________________ --Marcelo '06 Arctic Metallic 325i \| Sport Package \| 6MT \| Dinan Stage III suspension \| Dinan exhaust \| 330i manifold swap! Click here! \| Active Autowerke tune \| 135i Brake Calipers \| Deiselboost caliper brackets \| E46 M3 front rotors
	Appreciate 0 Quote

07-21-2011, 03:36 PM	#5
gino58 Enlisted Member 4 Rep 42 Posts Drives: 2006 325i zsp Join Date: Oct 2008 Location: elk grove, ca iTrader: (0)	what's your mileage? is this easy to replace? i'm thinking of replacing this part at let's say 100K as preventive maintenance; anyway it only cost about $50
	Appreciate 0 Quote

07-21-2011, 03:57 PM	#6
e90pilot Freight Dawg 105 Rep 2,103 Posts Drives: E90 325i Join Date: Jul 2005 Location: Oakland, CA iTrader: (3)	I've 164k and counting. And it is an extreme PITA to replace. __________________ --Marcelo '06 Arctic Metallic 325i \| Sport Package \| 6MT \| Dinan Stage III suspension \| Dinan exhaust \| 330i manifold swap! Click here! \| Active Autowerke tune \| 135i Brake Calipers \| Deiselboost caliper brackets \| E46 M3 front rotors
	Appreciate 0 Quote

07-21-2011, 05:26 PM	#8
Donia330i Major 137 Rep 1,426 Posts Drives: 19 330i BSM Join Date: Feb 2009 Location: Atlanta, GA iTrader: (7)	Any other issues with that many miles?
	Appreciate 0 Quote

07-21-2011, 05:34 PM	#9
e90pilot Freight Dawg 105 Rep 2,103 Posts Drives: E90 325i Join Date: Jul 2005 Location: Oakland, CA iTrader: (3)	Nothing major so far. The oil pan gasket, rear main seal, oil filter housing gasket, and pressure power steering are all leaking. Not spewing, just leaking. I had a coil pack die on me not that long ago. At 90k the diff died and at 5k the water pump died. Those are the only major problems I've had. __________________ --Marcelo '06 Arctic Metallic 325i \| Sport Package \| 6MT \| Dinan Stage III suspension \| Dinan exhaust \| 330i manifold swap! Click here! \| Active Autowerke tune \| 135i Brake Calipers \| Deiselboost caliper brackets \| E46 M3 front rotors
	Appreciate 0 Quote

07-21-2011, 09:12 PM	#10
krnboy817 Major 45 Rep 1,011 Posts Drives: 2008 328i coupe Join Date: Oct 2010 Location: DFW texas iTrader: (3)	my e92 is actually in service right now... and its been 2 days and no calls from SA stating what the issue is causing this. i believe benzo23 and i have been pretty active on the other thread that concerns the similar issue as this one. i actually went to the dealership where my e92 is being serviced at and tried the engine start on 2 different (2008 and 2010) e92 328i... and surprisingly and disappointedly, they all did the same thing. i can understand mine and the 2008 model having this issue with a broken or cracked part, but a new one shouldnt have done this. at that moment the SA had me convinced that its the character of our engine... but now im glad that i have something i can talk to the SA about and get him to check out on. __________________ driving is poetry in motion.
	Appreciate 0 Quote

07-21-2011, 10:50 PM	#11
MaximusJ Colonel 307 Rep 2,485 Posts Drives: 340Xi MG 2017 Join Date: Jul 2010 Location: Quebec, Canada iTrader: (21) Garage List 2017 BMW 340XI (F30) [9.00] 2006 BMW 325I (E90) [7.44]	I remember mike-y broking a line while swapping his intake manifold... Could it be that line? __________________ Mineral Grey '17 F30 340XI [Garage] // [Build Journal] Jet Black '06 E90 325I [Garage]
	Appreciate 0 Quote

07-22-2011, 12:34 AM	#13
e90pilot Freight Dawg 105 Rep 2,103 Posts Drives: E90 325i Join Date: Jul 2005 Location: Oakland, CA iTrader: (3)	Not really my engine bay was extremely dirty for a long time. It was only after I cleaned it that I saw the marks from the leak. Just take a look, if it's not leaking, don't change it out just yet. Also, if your PCV lines aren't broken, don't replace them prematurely. There is a lot of potential to break fragile things back there. __________________ --Marcelo '06 Arctic Metallic 325i \| Sport Package \| 6MT \| Dinan Stage III suspension \| Dinan exhaust \| 330i manifold swap! Click here! \| Active Autowerke tune \| 135i Brake Calipers \| Deiselboost caliper brackets \| E46 M3 front rotors
	Appreciate 0 Quote