E92 Injector Replacement and coding ISTA - Still runs rough

M80DCX · 02-20-2022, 09:33 PM

Hi All

So the run of this post is to see if anyone has the answer to my e92 nightmare lol - So i drive a 2008 e92 330i m sport n53 - I have been through approximately 6 months of the dreaded P3090 Plausibility fault code and recently swapped out all 6 injectors... i worked in ISTA to set the coding values for each injector and the system saved the data.... since the swap out im having a brand new fun issue lol... basically she runs crazy lumpy on cold start still, may or may not throw up a misfire code but once running a couple minutes she runs sweet as she ever has (So Happy Dance Time)

...BUT...

I cant give her any sort of power?!!!... I can smoothly run through gears 1 2 3 if you imagine a steady (upto) 30mph town driving conditions, but say i need to overtake, if i accelerate too quickly its like shes being starved of fuel?!...she will hiccup as if just on the brink of a missfire and of course by then i ease off and she settles back down to a steady pace...

Anyone know what could be causing this issue?

If it helps i have swapped out pretty much the ENTIRE fuel system in mechanical terms, new LPFP, HPFP, Rail, Injectors x6, HPFP pressure sensor, Rail sensor, have bled the fuel system after the injector replacement, i made sure all stored fault codes were deleted, reset adaptations, run the 100miles it can take for adaptations to take effect...im lost, like proper lost now

Problem is i wanted to test each new injector by triggering through ISTA but it just comes up with SYS-0010 INITIALIZATION ERROR and doesnt let me do anything else.... soooo my next step was to activate the Smooth Run Control on ISTA and go from there but would be awesome to see if ive missed something here?

Any help, advice or anything would be massively appreciated... Thanks

Phil325i · 02-21-2022, 04:13 AM

Problems like this are the pits aren't they? Especially when you've thrown so much money at it. The best thing I can suggest is to ask a BMW indy who has ITSA to run a full diagnostic.

I remember I had a misfire fault some years back and my indy ran the diag which revealed an LPFP control unit fault. I'd never have worked that out in a month of Sundays! Hope you get it sorted...

Riptidez · 02-21-2022, 03:24 PM

Scan to see which cylinder is misfiring. Pre LCIs had issues with injector drivers in the ECM and also if it's misfiring under load it could be a bad ignition coil. Also did u do a carbon cleanup?

02-20-2022, 09:33 PM	#1
M80DCX The Girl With The Skills! 4 Rep 11 Posts Drives: E92 N53 - 330i msport Join Date: Sep 2020 Location: Nottinghamshire iTrader: (0) Garage List 2008 BMW e92 330i m ... [0.00]	E92 Injector Replacement and coding ISTA - Still runs rough - What have i missed? Hi All So the run of this post is to see if anyone has the answer to my e92 nightmare lol - So i drive a 2008 e92 330i m sport n53 - I have been through approximately 6 months of the dreaded P3090 Plausibility fault code and recently swapped out all 6 injectors... i worked in ISTA to set the coding values for each injector and the system saved the data.... since the swap out im having a brand new fun issue lol... basically she runs crazy lumpy on cold start still, may or may not throw up a misfire code but once running a couple minutes she runs sweet as she ever has (So Happy Dance Time) ...BUT... I cant give her any sort of power?!!!... I can smoothly run through gears 1 2 3 if you imagine a steady (upto) 30mph town driving conditions, but say i need to overtake, if i accelerate too quickly its like shes being starved of fuel?!...she will hiccup as if just on the brink of a missfire and of course by then i ease off and she settles back down to a steady pace... Anyone know what could be causing this issue? If it helps i have swapped out pretty much the ENTIRE fuel system in mechanical terms, new LPFP, HPFP, Rail, Injectors x6, HPFP pressure sensor, Rail sensor, have bled the fuel system after the injector replacement, i made sure all stored fault codes were deleted, reset adaptations, run the 100miles it can take for adaptations to take effect...im lost, like proper lost now Problem is i wanted to test each new injector by triggering through ISTA but it just comes up with SYS-0010 INITIALIZATION ERROR and doesnt let me do anything else.... soooo my next step was to activate the Smooth Run Control on ISTA and go from there but would be awesome to see if ive missed something here? Any help, advice or anything would be massively appreciated... Thanks __________________ @[M80DCX](contact:522002) TINK - BMW E92 330i m sport N53 - Bwaaaarp!
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02-21-2022, 04:13 AM	#2
Phil325i Brigadier General 639 Rep 3,215 Posts Drives: E92 325i MSport Coupe Join Date: Apr 2012 Location: UK South East iTrader: (1) Garage List 2009 BMW 325i Coupe [6.00]	Problems like this are the pits aren't they? Especially when you've thrown so much money at it. The best thing I can suggest is to ask a BMW indy who has ITSA to run a full diagnostic. I remember I had a misfire fault some years back and my indy ran the diag which revealed an LPFP control unit fault. I'd never have worked that out in a month of Sundays! Hope you get it sorted... __________________ E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
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02-21-2022, 03:24 PM	#3
Riptidez New Member 2 Rep 6 Posts Drives: 335i M-Sport E90 LCI Join Date: Feb 2022 Location: Canada iTrader: (0)	Scan to see which cylinder is misfiring. Pre LCIs had issues with injector drivers in the ECM and also if it's misfiring under load it could be a bad ignition coil. Also did u do a carbon cleanup?
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