What caused this?

[Drawn05]

Rather than derail Stu's HPFP fix thread, I thought I would continue the tangent into what caused my 135 to enter limp (if it wasnt hpfp)

Well I just ran the BT tool and got the following:

29D1:
29D1 Misfirings, cylinder 5
Error will cause a warning light
Error is not currently present
Test conditions have been completed
Short circuit or signal interruption

Freeze Frame Information
Event 1Odometer 37352kms 23209miles
Engine temperature 105.00 °C
load value for misfire detection 75.78 %
Engine speed 6,304.00 rpm
Lambda integrator group 2 32.81 %


29D2:
29D2 Misfirings, cylinder 6
Error will cause a warning light
Error is not currently present
Test conditions have been completed
Short circuit or signal interruption

Freeze Frame Information
Event 1Odometer 37352kms 23209miles
Engine temperature 105.00 °C
load value for misfire detection 75.78 %
Engine speed 6,304.00 rpm
Lambda integrator group 2 32.81 %


29CC:
29CC Misfirings, several cylinders
Error will cause a warning light
Error is not currently present
Test conditions have been completed
Short circuit or signal interruption

Freeze Frame Information
Event 1Odometer 37352kms 23209miles
ambient temperature 24.75 °C
rail pressure 120,908.08 hPa
voltage Kl. 87 13.81 V
counter recognition bad road 42.00 -

So is this dodgy plugs/coil packs or more that DSC kicked in and the boost was too high for its normal interference and caused the DME to enter limp to protect itself - that last line about bad road is strange.

P.S. should have run the BT as soon as I got home, just forgot about it. Its a pretty good tool imho.

[RaihaX]

Try moving the spark plugs and the coils (5 and 6) and see if you can induce another misfire and see if it has moved IMO.

[Pig Farmer]

I had the same codes after running seafoam through the intake manifold for the first time (as expected), but i did not go into limp mode. I suspect something may have fouled your plugs. Are you running any additives in you fuel? I only ask since a couple people have suggested adding 2-stroke oil to the gasoline as a temporary cure for the HPFP issue.

[Drawn05]

Thats going to have to wait till thursday when I can get into it.

If the fault affects the other cylinders then I assume I just have to replace the coil/plugs, is that worth doing anyway? Should I replace all 6 or just those 2?

[RimasRS]

Looking at your codes, i would say that is first syptomps of bad hpfp. Or maybe even injectors. Maybe change of fuel filter could help but i dont know.

[Stuart@BMRAutowerkes]

Spark plugs are relatively inexpensive, ~$110 for 6 new ones.

Coil packs are a bit more, ~$300 for 6 new ones.

Total labour 1-2 hours.

[Taymaishu]

Try taking it to Advan, Pete just got the new Autologic system. Plugged it into my car today to reset a few things and also clear the codes from my dyno run last week.

Btw, what did your 25i dyno with the time and PE? Reason I ask is the car will hopefully be tuned (flash) next few weeks so we took a baseline dyno (yet had PE on). Would be good to compare once tuned.

[Stuart@BMRAutowerkes]

Originally Posted by Taymaishu

Try taking it to Advan, Pete just got the new Autologic system. Plugged it into my car today to reset a few things and also clear the codes from my dyno run last week.

Btw, what did your 25i dyno with the time and PE? Reason I ask is the car will hopefully be tuned (flash) next few weeks so we took a baseline dyno (yet had PE on). Would be good to compare once tuned.

Steve pulled 140kw atw

[Drawn05]

Originally Posted by bmroxm5

Spark plugs are relatively inexpensive, ~$110 for 6 new ones.

Coil packs are a bit more, ~$300 for 6 new ones.

Total labour 1-2 hours.

Can I get this done under warranty or are my chances slim? I am going to clear the codes and see if it happens again, then hit the dealers.

Originally Posted by Taymaishu

Try taking it to Advan, Pete just got the new Autologic system. Plugged it into my car today to reset a few things and also clear the codes from my dyno run last week.

Btw, what did your 25i dyno with the time and PE? Reason I ask is the car will hopefully be tuned (flash) next few weeks so we took a baseline dyno (yet had PE on). Would be good to compare once tuned.

Yes, 140rwkw was what the 125 got. I wouldnt bother with trying to tune the n52; its just a waste of time and money. I paid for ~40kw and was lucky to get 15kw by the looks of things.

[Stuart@BMRAutowerkes]

Originally Posted by Drawn05

Can I get this done under warranty or are my chances slim? I am going to clear the codes and see if it happens again, then hit the dealers.

I dont think you can get spark plugs/coil packs changed under warranty, they're 'consumables' after all.. but there was an injector recall? Maybe send your VIN to your preferred BMW dealer and ask them to see if your car is covered by the injector recall?

Clear codes and see if it happens again... if it does, then clear codes, remove procede, and try and create some codes while stock.

[x5mad]

Is your car stuttering at idle and is there a noticeable loss in power? This will point to faulty coil packs.

[Drawn05]

Originally Posted by bmroxm5

Clear codes and see if it happens again... if it does, then clear codes, remove procede, and try and create some codes while stock.

Yeah, thats what I'll do.

Going to continue on with the mods I have planned and wait for it to throw codes.

Edit: Also, does BMR offer the coil/plug replacement and if so, for how much?

[MrBlonde]

Take car to dealer.

[Drawn05]

Well, I had it booked in with the dealer last week (either they took my car for 3 days minimum or I could wait 1 1/2 weeks).

Since the first misfire, I havent been able to replicate it (despite some very vigourous attempts). When the procede gets taken out I will clear all the codes with BT and INPA to be on the safe side - but that will mean the fault codes in question wont be there.

So I am not sure what is the best thing to do - I can give them a print out of the BT error report with the misfire codes or just give the car to them and let them sort it out?

[Stuart@BMRAutowerkes]

Originally Posted by Drawn05

Well, I had it booked in with the dealer last week (either they took my car for 3 days minimum or I could wait 1 1/2 weeks).

Since the first misfire, I havent been able to replicate it (despite some very vigourous attempts). When the procede gets taken out I will clear all the codes with BT and INPA to be on the safe side - but that will mean the fault codes in question wont be there.

So I am not sure what is the best thing to do - I can give them a print out of the BT error report with the misfire codes or just give the car to them and let them sort it out?

Clear all codes and give it to them without codes and just say it was running crap and had limp mode...

I reckon it's better to not let them cotton on to you having INPA/BT Tool i.e. having them question why you would clear codes in the first place.

It's quite possible it was just a one off thing... if it doesn't happen again, then I guess it's all good?
Doesn't hurt to have your dealer aware of it though.

[Drawn05]

But if I give them the car without the error codes stored, wont they just say "we couldnt see anything and there were no errors recorded"?

Anyway, I guess I will take your advice and just give them the car and tell them what happened and see how it goes.

[luster]

I would not clear those specific codes as they aren't tuner related.

[Drawn05]

hmmm, how do you remove any lingering evidence of procede without clearing all errors? I dont even know what codes they could detect procede with?

I know with servicing they wouldnt care but if its a possible warranty issue they might be looking for ways out of it. I recall somone posting here recently that BMW told them they are checking for piggyback specific error codes.

[luster]

Originally Posted by Drawn05

hmmm, how do you remove any lingering evidence of procede without clearing all errors? I dont even know what codes they could detect procede with?

I know with servicing they wouldnt care but if its a possible warranty issue they might be looking for ways out of it. I recall somone posting here recently that BMW told them they are checking for piggyback specific error codes.

Normally the procede is detected when it is not removed correctly, thus leaving codes that CANclear has not got the chance to have cleared or creating new codes yourself by removing the tune while the car is still awake.

Here are some codes that are tune related or will make BMW believe you may have had a tune:


2F6C - Golf tee mod

2D18 manipulation cover, maximum air mass

2D25 Mass Air Flow Excessive - External Tuning Box Detected

2ABC Charging pressure sensor, electrical

2F71 E-box-fan, input signal

30FE Exhaust fume turbo charger, high pressure side

30FF Exhaust fume turbocharger low side

30F1 30F2 30F3 30F4 30F5 30F6: Excessive knock retard

29F4 29F5: cats removed

====

I personally am not a fan of removing codes unless they are tune related. Further, if these codes show after you have removed a tune and the freeze frame data confirms the odometer reading being when the tune wasn't installed, i also wouldn't remove the code.

Bare in mind BMW techs rely all too much on error codes and many times wont even do any real work on reported problems unless there is a related error code.

It is completely up to you what you do. Obviously it is 'safer' to just remove all codes and tune. I'm of the thinking that the more errors you have relating to a single problem will at least ensure a timely warranty replacement rather than having to wait forever for the error to come up again.

I have spoken to a few indy's and they collectively agree that introducing a tune to the N54 does greatly increase misfires. You could always put toether some extra coin and get Okada coils (about $1500, but almost solves misfirings related to aftermarket tunes)

[Drawn05]

Thanks, that was a very informative post.

The BT tool doesnt detect any of those codes but I havent tried with INPA yet - is that likely to detect them?

I am just confused as what to do. I dont want to be petty and expect them to replace everything becuase of 1 misfire event but after reading all those HPFP, injector recall and misfire threads - I get worried that it might because of them.

[luster]

Do what you are most comfortable with. If you take the car to the dealer, say you went into limp mode and have no codes. They will basically do nothing and charge you shop time for it.

If you have those codes, you may or may not have them do something.

I personally would wait and see if you have any more issues. Long cranks, misfires, limp mode etc.

[_Ryan_]

Originally Posted by Drawn05

Can I get this done under warranty or are my chances slim? I am going to clear the codes and see if it happens again, then hit the dealers.



Yes, 140rwkw was what the 125 got. I wouldnt bother with trying to tune the n52; its just a waste of time and money. I paid for ~40kw and was lucky to get 15kw by the looks of things.

What mods? tune/intake/exhaust?