S55 runs like a rotary, no fault codes??

F82be · 08-01-2022, 11:27 AM

Hello,

Need some help with my f82.

My problem started a day ago on the highway, at wot sometimes felt a slight hesitation.
Now my car runs like a rotary at idle and thru the rev range when revving and also shakes a lot. Like it's running on 5cil.

BUT I have no error OR fault code. Scanned with ISTA and also on bootmod shows no fault codes??

Where do I start with no fault codes?

Recently changed downpipes with stock cats (checkt al lambda connections and seems fine?)

My dealer is booked full for an other week so any help would be appreciated!

Sorry for bad English!!!

NSX2M4 · 08-01-2022, 05:17 PM

A wild guess here but it's possible the car was coded to run aftermarket downpipes and something is wrong with the stock cats you just installed yet the car is being prevented from showing it. Again, a wild guess.

F82be · 08-01-2022, 05:42 PM

Quote:

Originally Posted by NSX2M4

A wild guess here but it's possible the car was coded to run aftermarket downpipes and something is wrong with the stock cats you just installed yet the car is being prevented from showing it. Again, a wild guess.

Yes flashed back to stock and now I do get the errors, cel, fault codes etc!!

NSX2M4 · 08-01-2022, 05:47 PM

Were they used cats? Or new?

TopJimmy · 08-01-2022, 05:55 PM

What codes in BM3? Send a pic.

F82be · 08-01-2022, 08:13 PM

Think it's my injector, already switch coilpack and stays on cylinder 2.

Weird that bootmod 'blocks' these faultcodes and drivetrain errors etc !?

I did have o2 sensor cel off in my tune but don't think these codes have anything to do with o2 sensor’s no ?

TopJimmy · 08-01-2022, 08:46 PM

BM3 doesn't block codes unless you specifically put them in the ignore list. It can take an injector a little while to "break". Are you running E85 on stock turbos?

Get your plugs out and look at them. That's always my first step. If #2 is wet with fuel then you know that DI broke. If the cylinder has any fuel down in it then it needs to be sucked out.

F82be · 08-02-2022, 04:05 AM

It was definitely bm3 blocking the codes (installed it myself months ago, didn't block any codes). Probably scanned 20 times yesterday with bm3 app, ista, my autel scanner and even with my MHD app from my previous car. When I flashed back to stock the codes popped up right away.

No, pump gas on stock turbo's.

TopJimmy · 08-02-2022, 06:45 AM

Quote:

Originally Posted by F82be

It was definitely bm3 blocking the codes (installed it myself months ago, didn't block any codes). Probably scanned 20 times yesterday with bm3 app, ista, my autel scanner and even with my MHD app from my previous car. When I flashed back to stock the codes popped up right away.

No, pump gas on stock turbo's.

Good to know that you need a stock flash to find all codes.

F82be · 08-02-2022, 10:52 AM

It even blocked limpmode, cel, drivetrain error etc.....

TopJimmy · 08-02-2022, 02:33 PM

Quote:

Originally Posted by F82be

It even blocked limpmode, cel, drivetrain error etc.....

I was running custom E85 map and had an injector failure. The dash showed limp mode and requested immediate shutdown. Not sure why yours didn't.

NSX2M4 · 08-02-2022, 04:44 PM

Quote:

Originally Posted by F82be

It even blocked limpmode, cel, drivetrain error etc.....

Man, that's crazy. Another reason for me to get off the fence on a stage 1 tune...

F82be · 08-02-2022, 06:22 PM

Told bootmod about the problem, all i got was 'check your plugs an coils' and 'it should not be doing that"

Love bootmod but c'mon..

Might be a fault or something in the ' cs+ ' software.

F82be · 08-02-2022, 06:30 PM

Might try tomorrow to flash back cs+ and see if it blocks it again

amrazM · 08-03-2022, 06:57 AM

Check the compression of the affected cylinder.

F82be · 08-06-2022, 09:24 AM

Update;

Went to all the trouble of changing injector 2 and it turned out to be Spark plug cylinder 2 that died (i know should've changed plugs first...)

Note:

My spark plugs were super stuck, needed to go back and forward and even needed a prybar on my ratchet to get them out, is this common?

It's my first time changing plugs etc myself

TopJimmy · 08-06-2022, 10:27 AM

Quote:

Originally Posted by F82be

Update;

Went to all the trouble of changing injector 2 and it turned out to be Spark plug cylinder 2 that died (i know should've changed plugs first...)

Note:

My spark plugs were super stuck, needed to go back and forward and even needed a prybar on my ratchet to get them out, is this common?

It's my first time changing plugs etc myself

Plugs are usually under torqued, not over. The boxes say 23Nm… Maybe someone used 23 FtLbs instead of Nm, which would be 31Nm, or they just messed up.

08-01-2022, 11:27 AM	#1
F82be New Member 2 Rep 13 Posts Drives: F82 Join Date: Jul 2022 Location: Belgium iTrader: (0)	S55 runs like a rotary, no fault codes?? Hello, Need some help with my f82. My problem started a day ago on the highway, at wot sometimes felt a slight hesitation. Now my car runs like a rotary at idle and thru the rev range when revving and also shakes a lot. Like it's running on 5cil. BUT I have no error OR fault code. Scanned with ISTA and also on bootmod shows no fault codes?? Where do I start with no fault codes? Recently changed downpipes with stock cats (checkt al lambda connections and seems fine?) My dealer is booked full for an other week so any help would be appreciated! Sorry for bad English!!!
	Appreciate 0 Tweet Quote

08-01-2022, 05:17 PM	#2
NSX2M4 Major 1378 Rep 1,331 Posts Drives: 2019 M4 ZCP- RIVIAN R1S QUAD Join Date: Jun 2019 Location: FTL, FL iTrader: (1)	A wild guess here but it's possible the car was coded to run aftermarket downpipes and something is wrong with the stock cats you just installed yet the car is being prevented from showing it. Again, a wild guess. __________________ MGM Ext, SO int, Euro IKON, CS front lip, Carbon 1.5 diffuser, GTS/CS coding, M perf rear spoiler, & everything else STOCK. (Previous E39 and NA1 NSX owner) Those were the days!
	Appreciate 0 Quote

08-01-2022, 05:47 PM	#4
NSX2M4 Major 1378 Rep 1,331 Posts Drives: 2019 M4 ZCP- RIVIAN R1S QUAD Join Date: Jun 2019 Location: FTL, FL iTrader: (1)	Were they used cats? Or new? __________________ MGM Ext, SO int, Euro IKON, CS front lip, Carbon 1.5 diffuser, GTS/CS coding, M perf rear spoiler, & everything else STOCK. (Previous E39 and NA1 NSX owner) Those were the days!
	Appreciate 0 Quote

08-01-2022, 05:55 PM	#5
TopJimmy Major General 5459 Rep 5,152 Posts Drives: 2023 M3 Comp xDrive Join Date: Jul 2019 Location: Chester County, PA iTrader: (5)	What codes in BM3? Send a pic. __________________ '18 F80 Base 6MT \| '19 F82 Exec DCT \| '18 F82 Comp Exec DCT \| '23 G80cx
	Appreciate 1 WordOnRoad313.00 Quote

08-01-2022, 08:13 PM	#6
F82be New Member 2 Rep 13 Posts Drives: F82 Join Date: Jul 2022 Location: Belgium iTrader: (0)	Think it's my injector, already switch coilpack and stays on cylinder 2. Weird that bootmod 'blocks' these faultcodes and drivetrain errors etc !? I did have o2 sensor cel off in my tune but don't think these codes have anything to do with o2 sensor’s no ? Attached Images Last edited by F82be; 08-01-2022 at 08:20 PM..
	Appreciate 0 Quote

08-01-2022, 08:46 PM	#7
TopJimmy Major General 5459 Rep 5,152 Posts Drives: 2023 M3 Comp xDrive Join Date: Jul 2019 Location: Chester County, PA iTrader: (5)	BM3 doesn't block codes unless you specifically put them in the ignore list. It can take an injector a little while to "break". Are you running E85 on stock turbos? Get your plugs out and look at them. That's always my first step. If #2 is wet with fuel then you know that DI broke. If the cylinder has any fuel down in it then it needs to be sucked out. __________________ '18 F80 Base 6MT \| '19 F82 Exec DCT \| '18 F82 Comp Exec DCT \| '23 G80cx
	Appreciate 0 Quote

08-02-2022, 04:05 AM	#8
F82be New Member 2 Rep 13 Posts Drives: F82 Join Date: Jul 2022 Location: Belgium iTrader: (0)	It was definitely bm3 blocking the codes (installed it myself months ago, didn't block any codes). Probably scanned 20 times yesterday with bm3 app, ista, my autel scanner and even with my MHD app from my previous car. When I flashed back to stock the codes popped up right away. No, pump gas on stock turbo's.
	Appreciate 0 Quote

08-02-2022, 10:52 AM	#10
F82be New Member 2 Rep 13 Posts Drives: F82 Join Date: Jul 2022 Location: Belgium iTrader: (0)	It even blocked limpmode, cel, drivetrain error etc.....
	Appreciate 0 Quote

08-02-2022, 06:22 PM	#13
F82be New Member 2 Rep 13 Posts Drives: F82 Join Date: Jul 2022 Location: Belgium iTrader: (0)	Told bootmod about the problem, all i got was 'check your plugs an coils' and 'it should not be doing that" Love bootmod but c'mon.. Might be a fault or something in the ' cs+ ' software.
	Appreciate 0 Quote

08-02-2022, 06:30 PM	#14
F82be New Member 2 Rep 13 Posts Drives: F82 Join Date: Jul 2022 Location: Belgium iTrader: (0)	Might try tomorrow to flash back cs+ and see if it blocks it again
	Appreciate 0 Quote

08-03-2022, 06:57 AM	#15
amrazM mTekMods 2142 Rep 2,901 Posts Drives: like a granny. Join Date: Jan 2010 Location: Manhatan iTrader: (1)	Check the compression of the affected cylinder. __________________ 2011 Frozen Black/Fox Red E90 M3 650+WHP G-Power Supercharged First DCT to Manual Conversion Worldwide KW CS, BBS RI-A, BW Headers, Snow 2.5
	Appreciate 0 Quote

08-06-2022, 09:24 AM	#16
F82be New Member 2 Rep 13 Posts Drives: F82 Join Date: Jul 2022 Location: Belgium iTrader: (0)	Update; Went to all the trouble of changing injector 2 and it turned out to be Spark plug cylinder 2 that died (i know should've changed plugs first...) Note: My spark plugs were super stuck, needed to go back and forward and even needed a prybar on my ratchet to get them out, is this common? It's my first time changing plugs etc myself Last edited by F82be; 08-06-2022 at 09:59 AM..
	Appreciate 1 TopJimmy5458.50 Quote