2011 535i bucking feeling

izaazk · 09-25-2016, 12:56 AM

So I installed my JB4 the other night and it's made my bucking more noticeable

If I try to rev out the car it feels like it doesn't want to be revved and just bucks in a sense

No CEL this was there before JB4 but now more noticeable ...
Map 1

I haven't changed plugs yet but any idea what it could be?

Stück · 09-25-2016, 08:47 AM

How many miles on the plugs? It could be spark blowout. Hard to say anything for certain though from your description.

izaazk · 09-25-2016, 10:24 AM

I don't know for sure I bought new plugs will install them today

rayhwc · 09-25-2016, 08:27 PM

Possibly one or more of the ignition coils? I had initially experienced vibration on my car at highway speeds, then engine misfire on heavy throttle. Turns out one ignition coil was bad at 75k km.

eaglecomm · 05-05-2017, 06:37 PM

izaazk Any updates on your bucking? I feel like I have something similar and the JB4 and SB has made it more noticeable. I have changed the plugs and no difference. I might have to buy a single coil and go through the rounds and see if replacing any of them helps.

I have a manual so I thought it was me getting used to the clutch and gas since this car is new to me. But I can tell that my gas pedal is consistent when the bucking/stuttering happens.

Johnsaidgo · 05-06-2017, 12:23 AM

Quote:

Originally Posted by eaglecomm

izaazk Any updates on your bucking? I feel like I have something similar and the JB4 and SB has made it more noticeable. I have changed the plugs and no difference. I might have to buy a single coil and go through the rounds and see if replacing any of them helps.

I have a manual so I thought it was me getting used to the clutch and gas since this car is new to me. But I can tell that my gas pedal is consistent when the bucking/stuttering happens.

I installed JB4 and got a misfire in cylinder 2. Changing plugs tomorrow and will update on if it fixed the problem. if it doesnt, Ill definitely be doing the coil replacement. This has been super inconvenient haha I regret putting in the JB4. I have a manual too

5soko · 05-06-2017, 10:55 AM

Quote:

Originally Posted by Johnsaidgo

Quote:

Originally Posted by eaglecomm

izaazk Any updates on your bucking? I feel like I have something similar and the JB4 and SB has made it more noticeable. I have changed the plugs and no difference. I might have to buy a single coil and go through the rounds and see if replacing any of them helps.

I have a manual so I thought it was me getting used to the clutch and gas since this car is new to me. But I can tell that my gas pedal is consistent when the bucking/stuttering happens.

I installed JB4 and got a misfire in cylinder 2. Changing plugs tomorrow and will update on if it fixed the problem. if it doesnt, Ill definitely be doing the coil replacement. This has been super inconvenient haha I regret putting in the JB4. I have a manual too

How many miles on the car

Johnsaidgo · 05-06-2017, 11:57 AM

Quote:

Originally Posted by 5soko

How many miles on the car

37,000

Johnsaidgo · 05-06-2017, 10:17 PM

Quote:

Originally Posted by Johnsaidgo

I installed JB4 and got a misfire in cylinder 2. Changing plugs tomorrow and will update on if it fixed the problem. if it doesnt, Ill definitely be doing the coil replacement. This has been super inconvenient haha I regret putting in the JB4. I have a manual too

Changed spark plugs, none had signs of failure. Car has codes cleared and no CEL. Drove it for around 80 miles now with no hiccups.

Bmw doubles · 05-07-2017, 01:23 PM

If you have problems with a tune after plugs tap them down to .22

This helps prevent spark blow out due to running higher than stock boost. If it persists clean you MAF and MAP sensor. If that doesn't resolve your problem then invest into ignition coils. If all that doesn't resolve your problem then look at hpfp and injectors.

If all fails then just get the F80 M3

eaglecomm · 05-08-2017, 12:19 PM

Quote:

Originally Posted by 5soko

How many miles on the car

I'm at 81k miles. Problem is that I don't have any history with the car. So I am proactively working to replace what 'might' not have been done over time, anyways.

5soko · 05-08-2017, 08:12 PM

Quote:

Originally Posted by eaglecomm

I'm at 81k miles. Problem is that I don't have any history with the car. So I am proactively working to replace what 'might' not have been done over time, anyways.

I got ya, the full ignition system is a good place to start.. Coils and plugs. Esp when modded.

eaglecomm · 05-08-2017, 10:06 PM

Quote:

Originally Posted by 5soko

I got ya, the full ignition system is a good place to start.. Coils and plugs. Esp when modded.

Yeah, I'm hoping its the coils. Injectors are an expensive exploratory venture.

5soko · 05-09-2017, 07:46 AM

Quote:

Originally Posted by eaglecomm

Quote:

Originally Posted by 5soko

I got ya, the full ignition system is a good place to start.. Coils and plugs. Esp when modded.

Yeah, I'm hoping its the coils. Injectors are an expensive exploratory venture.

Injectors from bosch are about 130 each.. but do require ista to code in the specific injector number into the dme..

The injector removal tool is available on ebay for about 30 bucks from china..

Not a hard diy, pretty straight forward. But i haven't seen many injector failures on the N55..

eaglecomm · 05-09-2017, 09:15 AM

Quote:

Originally Posted by 5soko

Injectors from bosch are about 130 each.. but do require ista to code in the specific injector number into the dme..

The injector removal tool is available on ebay for about 30 bucks from china..

Not a hard diy, pretty straight forward. But i haven't seen many injector failures on the N55..

Got it. Thanks. I think I will put up a thread and explain what issues I am getting and see if anyone has had similarities. They seem too specific and reproducible.

5soko · 05-09-2017, 09:16 AM

Quote:

Originally Posted by eaglecomm

Quote:

Originally Posted by 5soko

Injectors from bosch are about 130 each.. but do require ista to code in the specific injector number into the dme..

The injector removal tool is available on ebay for about 30 bucks from china..

Not a hard diy, pretty straight forward. But i haven't seen many injector failures on the N55..

Got it. Thanks. I think I will put up a thread and explain what issues I am getting and see if anyone has had similarities. They seem too specific and reproducible.

And to be clear, no codes when scanning the car?

eaglecomm · 05-09-2017, 09:38 AM

Correct, no codes/CEL from OBD Reader/JB4 scan.

Bmw doubles · 05-09-2017, 10:32 AM

Are you getting bad MPG? O2 sensors can start going bad without throwing codes and the outcome is poor performance, loss of MPG, rough idle and in worse cases misfires. 1 misfire and then you'll get codes

eaglecomm · 05-09-2017, 12:41 PM

Quote:

Originally Posted by Bmw doubles

Are you getting bad MPG? O2 sensors can start going bad without throwing codes and the outcome is poor performance, loss of MPG, rough idle and in worse cases misfires. 1 misfire and then you'll get codes

Reported with the computer @ ~25MPG. I haven't manually logged it yet though.

addy27 · 05-16-2017, 10:28 AM

I have an n63 and was getting the stuttering/bucking and it got worse, the car started throwing the dreaded Drivetrain Malfunction error and the engine would start running rough. The reason is that the DME will turn off a cylinder that is not performing at the same level and so that threw the whole thing off balance by running only 7 cylinders. Anyways, after two trips to the dealer and replacing coils and injector on the suspected cylinder, they nailed it down to one particular spark plug. They had tried swapping it to a different cylinder first and it worked on that cylinder so they swapped it back. But once they replaced the cool, the stuttering got worse. Once the spark plug was replaced, I'm not getting the stuttering/bucking or drivetrain malfunctions and I've tried to push the car too. So my recommendation would be spark plugs first.

09-25-2016, 12:56 AM	#1
izaazk Captain 140 Rep 625 Posts Drives: 2013 335i Join Date: Aug 2016 Location: Chicago, Illinois iTrader: (1)	2011 535i bucking feeling So I installed my JB4 the other night and it's made my bucking more noticeable If I try to rev out the car it feels like it doesn't want to be revved and just bucks in a sense No CEL this was there before JB4 but now more noticeable ... Map 1 I haven't changed plugs yet but any idea what it could be?
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09-25-2016, 08:47 AM	#2
Stück Major 801 Rep 1,214 Posts Drives: F15 X5, E46 330i, R56 Mini.S Join Date: May 2016 Location: Houston, TX iTrader: (4)	How many miles on the plugs? It could be spark blowout. Hard to say anything for certain though from your description.
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09-25-2016, 10:24 AM	#3
izaazk Captain 140 Rep 625 Posts Drives: 2013 335i Join Date: Aug 2016 Location: Chicago, Illinois iTrader: (1)	I don't know for sure I bought new plugs will install them today
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09-25-2016, 08:27 PM	#4
rayhwc New Member 3 Rep 24 Posts Drives: F11 535i Join Date: Apr 2011 Location: Asia iTrader: (0)	Possibly one or more of the ignition coils? I had initially experienced vibration on my car at highway speeds, then engine misfire on heavy throttle. Turns out one ignition coil was bad at 75k km.
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05-05-2017, 06:37 PM	#5
eaglecomm Enlisted Member 2 Rep 41 Posts Drives: 2011 535i 6MT & 2015 M6 GC CP Join Date: Apr 2017 Location: 27613 iTrader: (0) Garage List 2011 BMW 535i [10.00]	izaazk Any updates on your bucking? I feel like I have something similar and the JB4 and SB has made it more noticeable. I have changed the plugs and no difference. I might have to buy a single coil and go through the rounds and see if replacing any of them helps. I have a manual so I thought it was me getting used to the clutch and gas since this car is new to me. But I can tell that my gas pedal is consistent when the bucking/stuttering happens.
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05-07-2017, 01:23 PM	#10
Bmw doubles Dream crusher 984 Rep 2,421 Posts Drives: Fast Join Date: Mar 2015 Location: westside iTrader: (0) Garage List 2011 535 [0.00]	If you have problems with a tune after plugs tap them down to .22 This helps prevent spark blow out due to running higher than stock boost. If it persists clean you MAF and MAP sensor. If that doesn't resolve your problem then invest into ignition coils. If all that doesn't resolve your problem then look at hpfp and injectors. If all fails then just get the F80 M3 __________________ 535i MIssion Performance, PS2, Helix HPFP Kit, Wagner FMIC, Spec 3 clutch, Steel SMF, Wolf Racing CP, UUC SSK, GFB dv, SprintBooster, Custom Dynomax Exhaust, M5 Sways, Eibach OE Springs, Koni Sports Adjustable, Custom Short Ram CAI IG: @bmwdoubles
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05-09-2017, 09:38 AM	#17
eaglecomm Enlisted Member 2 Rep 41 Posts Drives: 2011 535i 6MT & 2015 M6 GC CP Join Date: Apr 2017 Location: 27613 iTrader: (0) Garage List 2011 BMW 535i [10.00]	Correct, no codes/CEL from OBD Reader/JB4 scan.
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05-09-2017, 10:32 AM	#18
Bmw doubles Dream crusher 984 Rep 2,421 Posts Drives: Fast Join Date: Mar 2015 Location: westside iTrader: (0) Garage List 2011 535 [0.00]	Are you getting bad MPG? O2 sensors can start going bad without throwing codes and the outcome is poor performance, loss of MPG, rough idle and in worse cases misfires. 1 misfire and then you'll get codes __________________ 535i MIssion Performance, PS2, Helix HPFP Kit, Wagner FMIC, Spec 3 clutch, Steel SMF, Wolf Racing CP, UUC SSK, GFB dv, SprintBooster, Custom Dynomax Exhaust, M5 Sways, Eibach OE Springs, Koni Sports Adjustable, Custom Short Ram CAI IG: @bmwdoubles
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05-16-2017, 10:28 AM	#20
addy27 Captain 388 Rep 949 Posts Drives: F10 550i Join Date: Jan 2008 Location: Bay Area, CA iTrader: (2)	I have an n63 and was getting the stuttering/bucking and it got worse, the car started throwing the dreaded Drivetrain Malfunction error and the engine would start running rough. The reason is that the DME will turn off a cylinder that is not performing at the same level and so that threw the whole thing off balance by running only 7 cylinders. Anyways, after two trips to the dealer and replacing coils and injector on the suspected cylinder, they nailed it down to one particular spark plug. They had tried swapping it to a different cylinder first and it worked on that cylinder so they swapped it back. But once they replaced the cool, the stuttering got worse. Once the spark plug was replaced, I'm not getting the stuttering/bucking or drivetrain malfunctions and I've tried to push the car too. So my recommendation would be spark plugs first.
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