Bad injectors may be next big problem for the 335i's??

Christos · 10-07-2009, 09:47 AM

So far on my 2008 335i I had two HPFP and one regular fuel pump replaced. After the second HPFP was replaced i started to get cold start up problems, car would shake, surge and hesitate.

First visit, BMW cleaned the injectors, cold start problems went away for about 3 days then came back with a vengeance. The car started up one morning last week shaking, shuttering, backfiring and I could only drive around 30 mph...

And guess what, BMW said it was not a HPFP, but 3 bad injectors. Puma case was opened and BMW ordered the dealer to replace only the 3 bad injectors, but the dealer insisted on replacing all 6, BMW agreed.

Injectors are a different part no. than the original ones?????Hmmmmmmm.

Makes one wonder, doesn't it????

undecided · 10-07-2009, 10:42 AM

Quote:

Originally Posted by Christos

So far on my 2008 335i I had two HPFP and one regular fuel pump replaced. After the second HPFP was replaced i started to get cold start up problems, car would shake, surge and hesitate.

First visit, BMW cleaned the injectors, cold start problems went away for about 3 days then came back with a vengeance. The car started up one morning last week shaking, shuttering, backfiring and I could only drive around 30 mph...

And guess what, BMW said it was not a HPFP, but a bad injector. Puma case was opened and BMW ordered the dealer to replace the bad injector, but the dealer insisted on replacing all 6, BMW agreed.

Injectors are a different part no. than the original ones?????Hmmmmmmm.

Makes one wonder, doesn't it????

Well, the injectors are part of the same fuel system, right? So far we have lpfp,hpfp, fuel sensor and injectors all failing on a regular basis on these cars.

eyemdbmw · 10-07-2009, 10:43 AM

i think there is a SIB about this issue.
i'm changing my spark plugs now due to cyl. 5 misfire and rough idle. hope it is not a bad injector.

McMuffin · 10-07-2009, 10:43 AM

My friend who is a BMW tech said our cars have very good injectors, so maybe it was just your bad luck.

Christos · 10-07-2009, 10:48 AM

Quote:

Originally Posted by McMuffin

My friend who is a BMW tech said our cars have very good injectors, so maybe it was just your bad luck.

Luck has noting to do with it.

Search and you'll see many folks have injectors issues, especially from cars above 30,000 miles. some are misdiagnosed as HPFP, spark plugs,etc...

Christos · 10-07-2009, 10:55 AM

Quote:

Originally Posted by McMuffin

My friend who is a BMW tech said our cars have very good injectors, so maybe it was just your bad luck.

Yes they are good when they work just like the HPFP, it works great when it works properly. My friend who is the Manager of the Service dept. indicated that this injector issue is arising and BMW is seriously looking into it and gathering information.

They are looking at possible malformation of the piezo crystals, in the injectors, over time affecting the spray pattern of gas.

BavarianBullet · 10-07-2009, 11:04 AM

I dunno if these tests are relevant with an N54 and how it would respond but the time-tested checks for bad injectors are:

1) test for electrical resistance across the injector's contacts (high or infinite resistance is of course bad)
2) simply unplug one injector at a time and whichever one doesn't affect the already-lumpy idle very much is likely bad.

For #2 often a car's computer can be put into a test mode to perform the "cylinder balance" test which will report back the bad cylinder/injector/coilpack.

I'm interested to see what the BT cable and DME can do. I kinda have a feeling the DME wouldn't like #2 above very much.

joec500 · 10-07-2009, 11:40 AM

I can confirm this last week I got my injectors replaced ....37,000 miles Bad injectors fouling the plugs.

All Plugs and Injectors replaced under warranty.

Car is running great so far....knock on wood.

AlpineG05 · 10-07-2009, 11:53 AM

My plugs and injectors were replaced when the car had only 12k on it.

DrooG · 10-07-2009, 01:18 PM

If its not one thing its another...

badass335 · 10-07-2009, 01:23 PM

I wonder if this is my problem now! i'm getting misfires in 1 cyl, cyl 6. No matter what i do, it's there. I've had the injector replaced once already in April!

skate_E92 · 10-07-2009, 01:24 PM

hpfp replaced at 2000k and in again for rough idle at 8000k dealer says either hpfp or injectors

, should find out today...

GreenPlease · 10-07-2009, 01:27 PM

Bad fuel?

kentgbr · 10-07-2009, 02:10 PM

Quote:

Originally Posted by joec500

I can confirm this last week I got my injectors replaced ....37,000 miles Bad injectors fouling the plugs.

All Plugs and Injectors replaced under warranty.

Car is running great so far....knock on wood.

Same here, except at only 19K. Supposedly the replacement injectors are an updated part.

cn555ic · 10-07-2009, 02:11 PM

Quote:

Originally Posted by GreenPlease

Bad fuel?

+1

Quisp · 10-08-2009, 01:51 AM

Had all 6 injectors replaced at about 21,000 miles. I am curious, should the plugs be changed when a car gets new injectors? Mine were not and not long after the injectors were rplaced the car began to run sluggish and idle inevenly and accelerate like it was loaded withsand bags. Mileage also dropped from 23 to 18mpg

inthemiddle · 10-08-2009, 09:32 AM

Quote:

Originally Posted by kentgbr

Supposedly the replacement injectors are an updated part.

we've all heard that before

seriously though i hope they are !!!!

joec500 · 10-08-2009, 11:05 AM

Quote:

Originally Posted by Quisp

Had all 6 injectors replaced at about 21,000 miles. I am curious, should the plugs be changed when a car gets new injectors? Mine were not and not long after the injectors were rplaced the car began to run sluggish and idle inevenly and accelerate like it was loaded withsand bags. Mileage also dropped from 23 to 18mpg

Yes Deffinitly! My plugs were only two weeks old, but the tech insisted on swapping to new ones because the bad injector fouled the plugs. I mean...you are swapping $2,000 worth of fuel injectors, what's another $80-100 on plugs.

pdjafari · 10-08-2009, 11:27 AM

I wonder why no members in europe and canada have these problems, is the gas in the US really that piss poor??

BavarianBullet · 10-08-2009, 12:05 PM

Quote:

Originally Posted by pdjafari

I wonder why no members in europe and canada have these problems, is the gas in the US really that piss poor??

If that were the case, wouldn't a lot of other cars, both DI and non-DI, have similar problems? The N54 isn't the only DI engine after all.

joec500 · 10-08-2009, 12:08 PM

Quote:

Originally Posted by BavarianBullet

If that were the case, wouldn't a lot of other cars, both DI and non-DI, have similar problems? The N54 isn't the only DI engine after all.

the 2.0T Audi/VW motor also has carbon buildup issues, also I had one of the first generations of this motor in my 2006 B7 A4, and there were some fuel pump related failures as well, most of them were related to the cam lobes wearing prematurely.

But the Injector and Fuel pump failures are NOTHING like what's going on in the N54.

packinDSS · 10-08-2009, 01:23 PM

Quote:

Originally Posted by Christos

So far on my 2008 335i I had two HPFP and one regular fuel pump replaced. After the second HPFP was replaced i started to get cold start up problems, car would shake, surge and hesitate.

First visit, BMW cleaned the injectors, cold start problems went away for about 3 days then came back with a vengeance. The car started up one morning last week shaking, shuttering, backfiring and I could only drive around 30 mph...

And guess what, BMW said it was not a HPFP, but a bad injector. Puma case was opened and BMW ordered the dealer to replace the bad injector, but the dealer insisted on replacing all 6, BMW agreed.

Injectors are a different part no. than the original ones?????Hmmmmmmm.

Makes one wonder, doesn't it????

LEMON IT!

http://www.e90post.com/forums/showthread.php?t=307002

10-07-2009, 09:47 AM	#1
Christos Captain 189 Rep 609 Posts Drives: 2019 Z4 s3.0 Msport Join Date: Jun 2008 Location: Central, NJ iTrader: (0)	Bad injectors may be next big problem for the 335i's?? So far on my 2008 335i I had two HPFP and one regular fuel pump replaced. After the second HPFP was replaced i started to get cold start up problems, car would shake, surge and hesitate. First visit, BMW cleaned the injectors, cold start problems went away for about 3 days then came back with a vengeance. The car started up one morning last week shaking, shuttering, backfiring and I could only drive around 30 mph... And guess what, BMW said it was not a HPFP, but 3 bad injectors. Puma case was opened and BMW ordered the dealer to replace only the 3 bad injectors, but the dealer insisted on replacing all 6, BMW agreed. Injectors are a different part no. than the original ones?????Hmmmmmmm. Makes one wonder, doesn't it???? __________________ 2019 Z4 sDrive 30i Msport, Previously owned BMWs, 2014 428i Msport, 2008 335i Coupe, 2007 328xi sedan, 2002 325i sedan 1996 318ti (loved this little car) Last edited by Christos; 10-13-2009 at 08:36 PM..
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10-07-2009, 10:43 AM	#3
eyemdbmw Second Lieutenant 15 Rep 235 Posts Drives: 2008 e93 335i space/coral/pop Join Date: Jan 2008 Location: bloomington, il iTrader: (1)	i think there is a SIB about this issue. i'm changing my spark plugs now due to cyl. 5 misfire and rough idle. hope it is not a bad injector. __________________ cosmetic mods - BBS LM's, body colored reflectors, 30% tint permormance mods - procede rev II, vishnu dci, helix fmic, ar catless dp's
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10-07-2009, 10:43 AM	#4
McMuffin Lieutenant Colonel 104 Rep 1,549 Posts Drives: A Widebody 92 Join Date: Nov 2008 Location: Califas iTrader: (5)	My friend who is a BMW tech said our cars have very good injectors, so maybe it was just your bad luck.
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10-07-2009, 11:04 AM	#7
BavarianBullet Lieutenant 18 Rep 429 Posts Drives: 2014 Audi S5 Join Date: Jul 2008 Location: Connecticut iTrader: (1)	I dunno if these tests are relevant with an N54 and how it would respond but the time-tested checks for bad injectors are: 1) test for electrical resistance across the injector's contacts (high or infinite resistance is of course bad) 2) simply unplug one injector at a time and whichever one doesn't affect the already-lumpy idle very much is likely bad. For #2 often a car's computer can be put into a test mode to perform the "cylinder balance" test which will report back the bad cylinder/injector/coilpack. I'm interested to see what the BT cable and DME can do. I kinda have a feeling the DME wouldn't like #2 above very much. __________________ 2014 Audi S5 DSG 2011 335xi Sedan (retired) 2008 335xi Sedan (retired)
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10-07-2009, 11:40 AM	#8
joec500 Brigadier General 125 Rep 3,004 Posts Drives: it has 4 wheels Join Date: Jul 2008 Location: San Francisco iTrader: (10)	I can confirm this last week I got my injectors replaced ....37,000 miles Bad injectors fouling the plugs. All Plugs and Injectors replaced under warranty. Car is running great so far....knock on wood.
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10-07-2009, 11:53 AM	#9
AlpineG05 hi 129 Rep 1,140 Posts Drives: Alpine White G05 Join Date: Feb 2008 Location: Bakersfield, Cali iTrader: (1)	My plugs and injectors were replaced when the car had only 12k on it. __________________ 2022 M Sport G05 Jb4, CTS catless dp, M performance exhaust, bms intake, IND goodies, Maxton kit
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10-07-2009, 01:18 PM	#10
DrooG Doobidoob 0 Rep 51 Posts Drives: JB E92 335i Join Date: Aug 2009 Location: SoSocal, CA iTrader: (0)	If its not one thing its another...
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10-07-2009, 01:23 PM	#11
badass335 Lieutenant Colonel 109 Rep 1,948 Posts Drives: 2017 540i Xdrive Join Date: Jul 2007 Location: Surrey, BC iTrader: (10)	I wonder if this is my problem now! i'm getting misfires in 1 cyl, cyl 6. No matter what i do, it's there. I've had the injector replaced once already in April!
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10-07-2009, 01:24 PM	#12
skate_E92 Captain 33 Rep 688 Posts Drives: 09' e92 335i Join Date: May 2009 Location: SoCal iTrader: (3)	hpfp replaced at 2000k and in again for rough idle at 8000k dealer says either hpfp or injectors , should find out today... __________________ TX. 2 CA.
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10-07-2009, 01:27 PM	#13
GreenPlease Lieutenant Colonel 129 Rep 1,629 Posts Drives: BMW 335i e92 Join Date: Feb 2008 Location: Orlando Florida iTrader: (2)	Bad fuel? __________________ Cars>Women
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10-08-2009, 01:51 AM	#16
Quisp Does not play well with others 80 Rep 1,787 Posts Drives: BMW Join Date: Apr 2007 Location: Arizona iTrader: (4)	Had all 6 injectors replaced at about 21,000 miles. I am curious, should the plugs be changed when a car gets new injectors? Mine were not and not long after the injectors were rplaced the car began to run sluggish and idle inevenly and accelerate like it was loaded withsand bags. Mileage also dropped from 23 to 18mpg __________________
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10-08-2009, 11:27 AM	#19
pdjafari Colonel 152 Rep 2,461 Posts Drives: G80 M3C Join Date: Oct 2007 Location: Earth iTrader: (5)	I wonder why no members in europe and canada have these problems, is the gas in the US really that piss poor??
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