Engine Malfunction

Ferruccio · 08-29-2012, 09:35 PM

Hi, everyone. I have two issues with the car, which might be related:

1: In the past 6 months or so, immediately after a hard acceleration, after a shift from first to second, I get the standard notification that there is an engine malfunction, and goes into limp mode.

I have only had this happen to be twice. The first time was last March or so. I simply pull over, restart the car, and everything's fine. Any idea what is going on? It's clearly hard to reproduce, so I do not know how I'd be able to get the dealer to look at it (still under warranty).

2: Also, the engine is getting a bit of a rough idle. It's not nearly as rough as other engines I've used, but it's definitely enough that, per cycle of the engine, there is some variation, which you can hear *very* faintly with the occasional popping sound, which vibrates the stickshift. I am not sure if these problems are related.

I sent it to the dealer, and they had the car for about a week, trying to reproduce the idle problem, and they were not able to pinpoint it.

I am posting it here because I am considering modifications, but I want to make sure everything is good right now, as mods could surely exacerbate any problems I currently have. The problem is getting the dealer to diagnose whatever is happening. The problems are so few and far between (months), but it's still unnerving knowing that there is *something* wrong. And, whatever it is, again, I would need to reproduce that error to the dealer, or the dealer themselves would need to reproduce it.

enrita · 08-30-2012, 04:21 AM

codes?
sounds like injectors or coils or plugs.

BMJ · 08-30-2012, 05:54 AM

Quote:

Originally Posted by enrita

codes?
sounds like injectors or coils or plugs.

+1 since it has check engine light come on. codes after that for me where misfires.

scflaw · 08-30-2012, 10:39 AM

sounds like what happened to my car. I had a CC ID 29 with a P30FE (wastegate stuck)

as enrita said earlier your best bet is to read the codes and replace the coil packs or plugs. If that fails it means your HPFP or injectors are starting to fail.

I was unlucky and had to replace plugs, coils, hpfp and all injectors. I think they adjusted my wastegate as well. Car runs perfectly now. Hope that helps.

Ferruccio · 08-30-2012, 12:01 PM

I'm still under warranty, so maybe I can send it to the dealer and they can read the codes. How long will those codes remain in "memory"?

I should make an addendum that I do not know how to check the codes in the car. I just assumed that required an OBD-II cable, which I do not have.

enrita · 08-30-2012, 12:12 PM

they remain till you delete them. just take it to the dealer.

Ferruccio · 08-30-2012, 01:35 PM

Alright, I set up an appointment. It will be good to get some of these issues resolved before the warranty's up.

Ferruccio · 09-04-2012, 08:56 PM

Well, I set up an appointment and had the repairs done. Some sensors got replaced, as well as the front brakes and pads! It was prompt and free. I will check out how my engine idles now.

cn555ic · 09-04-2012, 09:02 PM

Another LP sensor. These seem to be very common issue these days

Ferruccio · 09-08-2012, 10:59 PM

I have noticed that the engine seems to be starting up much better now. Cranks and initial explosions in the cylinders are much more instant.

08-29-2012, 09:35 PM	#1
Ferruccio First Lieutenant 40 Rep 373 Posts Drives: 2010 335i Join Date: May 2011 Location: Colorado Springs, CO iTrader: (1)	Engine Malfunction - Reduced Engine Power Hi, everyone. I have two issues with the car, which might be related: 1: In the past 6 months or so, immediately after a hard acceleration, after a shift from first to second, I get the standard notification that there is an engine malfunction, and goes into limp mode. I have only had this happen to be twice. The first time was last March or so. I simply pull over, restart the car, and everything's fine. Any idea what is going on? It's clearly hard to reproduce, so I do not know how I'd be able to get the dealer to look at it (still under warranty). 2: Also, the engine is getting a bit of a rough idle. It's not nearly as rough as other engines I've used, but it's definitely enough that, per cycle of the engine, there is some variation, which you can hear very faintly with the occasional popping sound, which vibrates the stickshift. I am not sure if these problems are related. I sent it to the dealer, and they had the car for about a week, trying to reproduce the idle problem, and they were not able to pinpoint it. I am posting it here because I am considering modifications, but I want to make sure everything is good right now, as mods could surely exacerbate any problems I currently have. The problem is getting the dealer to diagnose whatever is happening. The problems are so few and far between (months), but it's still unnerving knowing that there is something wrong. And, whatever it is, again, I would need to reproduce that error to the dealer, or the dealer themselves would need to reproduce it.
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08-30-2012, 04:21 AM	#2
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	codes? sounds like injectors or coils or plugs. __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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08-30-2012, 10:39 AM	#4
scflaw Captain 208 Rep 741 Posts Drives: M135I, Macan S, G26 i4M50 Join Date: Jan 2011 Location: HKG iTrader: (1)	sounds like what happened to my car. I had a CC ID 29 with a P30FE (wastegate stuck) as enrita said earlier your best bet is to read the codes and replace the coil packs or plugs. If that fails it means your HPFP or injectors are starting to fail. I was unlucky and had to replace plugs, coils, hpfp and all injectors. I think they adjusted my wastegate as well. Car runs perfectly now. Hope that helps.
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08-30-2012, 12:01 PM	#5
Ferruccio First Lieutenant 40 Rep 373 Posts Drives: 2010 335i Join Date: May 2011 Location: Colorado Springs, CO iTrader: (1)	I'm still under warranty, so maybe I can send it to the dealer and they can read the codes. How long will those codes remain in "memory"? I should make an addendum that I do not know how to check the codes in the car. I just assumed that required an OBD-II cable, which I do not have.
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08-30-2012, 12:12 PM	#6
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	they remain till you delete them. just take it to the dealer. __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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08-30-2012, 01:35 PM	#7
Ferruccio First Lieutenant 40 Rep 373 Posts Drives: 2010 335i Join Date: May 2011 Location: Colorado Springs, CO iTrader: (1)	Alright, I set up an appointment. It will be good to get some of these issues resolved before the warranty's up.
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09-04-2012, 08:56 PM	#8
Ferruccio First Lieutenant 40 Rep 373 Posts Drives: 2010 335i Join Date: May 2011 Location: Colorado Springs, CO iTrader: (1)	Well, I set up an appointment and had the repairs done. Some sensors got replaced, as well as the front brakes and pads! It was prompt and free. I will check out how my engine idles now.
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09-04-2012, 09:02 PM	#9
cn555ic 441 Rep 18,331 Posts Drives: 335i Join Date: Jun 2007 Location: US iTrader: (6)	Another LP sensor. These seem to be very common issue these days
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09-08-2012, 10:59 PM	#10
Ferruccio First Lieutenant 40 Rep 373 Posts Drives: 2010 335i Join Date: May 2011 Location: Colorado Springs, CO iTrader: (1)	I have noticed that the engine seems to be starting up much better now. Cranks and initial explosions in the cylinders are much more instant.
	Appreciate 0 Quote