Missfire cylinder 6 with new HFPP, injectors, coils and spark plug...

rif75 · 02-21-2015, 08:42 AM

Hello guys,

I going to be crazy, since a long time now, I have missfire on hard map 7 and 6 (20.5psi). I'm running on fuel mix 60% of e85 and 40% of SP98. I changed first my spark for NKG irridium twice with 0.57mm, a month a go, I changed the high pressure pump since I had the first number part. After that, I changed all the coil and now the injectors of the cylinder 4, 5, 6 and after some test in second gear, missfire on cylinder 6, I changed coil with another cylinder, just in case but always cylinder 6 in missfire.

Please help, I don't know where to look, maybe need to take a fuel pump upgrade for e85? Give you 4 log of tonight.

Information about my car, 335i of 2007 with 53000km, 2 turbos KKK K04, wagner intercooler, DP, JB4 with flash e85, PCV valve, KW V3 suspensions, M3 e92 arms and anti roll bar, LSP Schnitzer 70%, clutch Sachs performance, Brembo 380x34 in front. On map 6 with 20.5 psi, 504hp on wheels.

3000GT MR · 02-21-2015, 10:24 AM

If you dont have a upgraded LPFP then thats your issue. cyl 6 is the last in line to get fuel so when all other cylinders drop the pressure in the rail and your HPFP cant keep up with demand because the LPFP is out of steam then thats your problem. SteveAZ has a solution for you.

924er · 02-21-2015, 02:33 PM

Quote:

Originally Posted by 3000GT MR

If you dont have a upgraded LPFP then thats your issue. cyl 6 is the last in line to get fuel so when all other cylinders drop the pressure in the rail and your HPFP cant keep up with demand because the LPFP is out of steam then thats your problem. SteveAZ has a solution for you.

Right on the money ^^

prelude2perfect · 02-21-2015, 02:55 PM

what RPM does the misfire occur? WOT? Do you have a dmfw?

rif75 · 02-21-2015, 07:43 PM

What a dmfw

The missfire appears almost all the time in 2egear between 6000-6500rpm. Sometime in 3e gear.

You think that with a high flow gay pump, it will be ok?

Some people told be about flywheel...

Chrisruf911 · 02-21-2015, 07:48 PM

Dual mass flywheels can cause a misfire condition in higher horsepower cars.

rif75 · 02-21-2015, 09:07 PM

Thank you. I think I'll try to reduce the gap of the spark plug, maybe a new gas pump and then, the fly wheel because I already have to change soon my water pump with just 52000km

rif75 · 02-28-2015, 01:36 AM

Hello guys

I tried to reduce the gap at 0.5 and I think my misfire was worse than before. I will put a new spark plug with the original gap 0.57mm.

I think I'll try to buy a used smfw to try because I can't buy a new set for now and if it's not working again...

This month I already changed HPFP, rear tyres, front brakes, 3 injectors and now I have the water pump...

C.Pop · 02-28-2015, 02:19 AM

Make sure you reset a/f learning adaptations with Bav Tech tool or INPA.

rif75 · 02-28-2015, 03:29 AM

I did the reset adaptations of the dme with Rheingold after replacing the injectors.

Lambobimmer · 02-28-2015, 11:18 AM

Switch back to OEM plugs and I bet that your misfire will go away. I tried those plugs in my Z4 and I never could get them to work without a misfire.

rif75 · 02-28-2015, 12:55 PM

I already had the missfire with the oem plug but I'll try. Thanks

prelude2perfect · 03-01-2015, 04:30 PM

If you replaced coil plug and injector and it's only happening on high boost and it cylinder 6 then I can almost garuntee it's the DMFW.

rif75 · 03-03-2015, 12:01 PM

I'll see that soon, I just bought one used from Spec.

mike@x-ph.com · 03-03-2015, 01:05 PM

You cant run E60 without an upgraded fuel pump
you need to get the Fuel-it Stage 2 Low pressure fuel pump

Aashenfox · 03-03-2015, 03:52 PM

Just trying to learn here, what is it about the DMFW that causes problems? And what does one do? Replace it? With another oem part? Or aftermarket?

Jeff@TopGearSolutions · 03-03-2015, 04:02 PM

Quote:

Originally Posted by Aashenfox

Just trying to learn here, what is it about the DMFW that causes problems? And what does one do? Replace it? With another oem part? Or aftermarket?

The stock DMFW is fine for vehicles with under 500WHP.

However, if the stock DMFW has high mileage, say 75K or more, then the internals begin to wear and fall apart. So then DMFW should be replaced at high mileage or or switch to a SMFW for a set up of over 500WHP.

We've had customers take apart those DMFW with high mileage vehicles and they said it was literally about to fall apart.

Most that go with a single mass flywheel upgrade get it cause its either cheaper then a DMFW or they plan on running more then 500WHP.

When going over 500WHP the stock DMFW becomes imbalanced. This imbalance will cause chronic check engine lights as a result of the vibrations.

If you are staying on stock turbo's I typically recommend folks to stay with the new OEM DMFW, as it will drive like stock, especially when mated to a good clutch kit, like Spec Stage 2+.

rif75 · 03-04-2015, 08:18 AM

I have 504hp et more than 700nm of torque, I just bought tmap sensor, charge pipe and forge DV to put little more boost on it. Actualy, i'm at 20.5psi and I want to try with 22psi.

I think I'll have 550hp and maybe 740nm so the simple mass is necessary in my case. I gave my log to Russel and my fuel pressure is fine.

02-21-2015, 08:42 AM	#1
rif75 Lieutenant 64 Rep 412 Posts Drives: BMW M4 LCI ZCP and BMW M5 f10 Join Date: Jan 2014 Location: Paris iTrader: (0)	Missfire cylinder 6 with new HFPP, injectors, coils and spark plug... Hello guys, I going to be crazy, since a long time now, I have missfire on hard map 7 and 6 (20.5psi). I'm running on fuel mix 60% of e85 and 40% of SP98. I changed first my spark for NKG irridium twice with 0.57mm, a month a go, I changed the high pressure pump since I had the first number part. After that, I changed all the coil and now the injectors of the cylinder 4, 5, 6 and after some test in second gear, missfire on cylinder 6, I changed coil with another cylinder, just in case but always cylinder 6 in missfire. Please help, I don't know where to look, maybe need to take a fuel pump upgrade for e85? Give you 4 log of tonight. Information about my car, 335i of 2007 with 53000km, 2 turbos KKK K04, wagner intercooler, DP, JB4 with flash e85, PCV valve, KW V3 suspensions, M3 e92 arms and anti roll bar, LSP Schnitzer 70%, clutch Sachs performance, Brembo 380x34 in front. On map 6 with 20.5 psi, 504hp on wheels.
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02-21-2015, 10:24 AM	#2
3000GT MR Major 265 Rep 1,392 Posts Drives: 09 335i/3000gt vr4 Join Date: Jun 2012 Location: Sav GA iTrader: (6)	If you dont have a upgraded LPFP then thats your issue. cyl 6 is the last in line to get fuel so when all other cylinders drop the pressure in the rail and your HPFP cant keep up with demand because the LPFP is out of steam then thats your problem. SteveAZ has a solution for you. __________________ Have a single turbo and/or tired of burning up O2 sensors? Ask me about the new ADV O2 sensor retro kits! 335i 2010 e92 M-sport Mods: VM Top mount 6466, Aquamist HSF4 w/custom direct port. VRSF IC + Exhaust 335i 2009 e90 665RWHP VFF900 ST RIP .
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02-21-2015, 02:55 PM	#4
prelude2perfect Captain 60 Rep 621 Posts Drives: 2013 M5 and 2015 535i Join Date: Apr 2010 Location: Savannah, GA iTrader: (8)	what RPM does the misfire occur? WOT? Do you have a dmfw?
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02-21-2015, 07:43 PM	#5
rif75 Lieutenant 64 Rep 412 Posts Drives: BMW M4 LCI ZCP and BMW M5 f10 Join Date: Jan 2014 Location: Paris iTrader: (0)	What a dmfw The missfire appears almost all the time in 2egear between 6000-6500rpm. Sometime in 3e gear. You think that with a high flow gay pump, it will be ok? Some people told be about flywheel...
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02-21-2015, 07:48 PM	#6
Chrisruf911 Second Lieutenant 39 Rep 227 Posts Drives: 2007 335i...not stock Join Date: Mar 2012 Location: Mt. Washington, Ky iTrader: (0)	Dual mass flywheels can cause a misfire condition in higher horsepower cars.
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02-21-2015, 09:07 PM	#7
rif75 Lieutenant 64 Rep 412 Posts Drives: BMW M4 LCI ZCP and BMW M5 f10 Join Date: Jan 2014 Location: Paris iTrader: (0)	Thank you. I think I'll try to reduce the gap of the spark plug, maybe a new gas pump and then, the fly wheel because I already have to change soon my water pump with just 52000km
	Appreciate 0 Quote

02-28-2015, 01:36 AM	#8
rif75 Lieutenant 64 Rep 412 Posts Drives: BMW M4 LCI ZCP and BMW M5 f10 Join Date: Jan 2014 Location: Paris iTrader: (0)	Hello guys I tried to reduce the gap at 0.5 and I think my misfire was worse than before. I will put a new spark plug with the original gap 0.57mm. I think I'll try to buy a used smfw to try because I can't buy a new set for now and if it's not working again... This month I already changed HPFP, rear tyres, front brakes, 3 injectors and now I have the water pump...
	Appreciate 0 Quote

02-28-2015, 02:19 AM	#9
C.Pop First Lieutenant 65 Rep 385 Posts Drives: 335i Join Date: May 2013 Location: AZ iTrader: (0)	Make sure you reset a/f learning adaptations with Bav Tech tool or INPA. __________________ 2007 E90, 6MT, VRSF 7" FMIC, RR DP's, Vargas Stage 2+ (19t unclipped), CP-e Charge Pipe/Tial BOV, BMS DCI, Fuel-it! Stg 2 LPFP, E66, 118k+ miles Brentuned
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02-28-2015, 03:29 AM	#10
rif75 Lieutenant 64 Rep 412 Posts Drives: BMW M4 LCI ZCP and BMW M5 f10 Join Date: Jan 2014 Location: Paris iTrader: (0)	I did the reset adaptations of the dme with Rheingold after replacing the injectors.
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02-28-2015, 11:18 AM	#11
Lambobimmer Major 292 Rep 1,473 Posts Drives: 2022 X3 M40i, 2018 TTRS Join Date: Jan 2010 Location: Tarheel iTrader: (14)	Switch back to OEM plugs and I bet that your misfire will go away. I tried those plugs in my Z4 and I never could get them to work without a misfire.
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02-28-2015, 12:55 PM	#12
rif75 Lieutenant 64 Rep 412 Posts Drives: BMW M4 LCI ZCP and BMW M5 f10 Join Date: Jan 2014 Location: Paris iTrader: (0)	I already had the missfire with the oem plug but I'll try. Thanks
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03-01-2015, 04:30 PM	#13
prelude2perfect Captain 60 Rep 621 Posts Drives: 2013 M5 and 2015 535i Join Date: Apr 2010 Location: Savannah, GA iTrader: (8)	If you replaced coil plug and injector and it's only happening on high boost and it cylinder 6 then I can almost garuntee it's the DMFW.
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03-03-2015, 12:01 PM	#14
rif75 Lieutenant 64 Rep 412 Posts Drives: BMW M4 LCI ZCP and BMW M5 f10 Join Date: Jan 2014 Location: Paris iTrader: (0)	I'll see that soon, I just bought one used from Spec.
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03-03-2015, 01:05 PM	#15
mike@x-ph.com BimmerPost Supporting Vendor 24197 Rep 190,805 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	You cant run E60 without an upgraded fuel pump you need to get the Fuel-it Stage 2 Low pressure fuel pump __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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03-03-2015, 03:52 PM	#16
Aashenfox Captain 128 Rep 664 Posts Drives: 08 E92 335xi 6AT Join Date: Jan 2015 Location: Brit in Greece iTrader: (0)	Just trying to learn here, what is it about the DMFW that causes problems? And what does one do? Replace it? With another oem part? Or aftermarket? __________________ 08 E92 335xi 6AT, Sapphire Black Metallic Modlist: 19x8.5+32/19x9.5+35 BBS CH-R Black, Michelin PSS 225/35/19 - 255/30/19, rolled rear fenders \| KW v3 coilovers \| Akrapovic exhaust Keep it on the black stuff shiny side up!
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03-04-2015, 08:18 AM	#18
rif75 Lieutenant 64 Rep 412 Posts Drives: BMW M4 LCI ZCP and BMW M5 f10 Join Date: Jan 2014 Location: Paris iTrader: (0)	I have 504hp et more than 700nm of torque, I just bought tmap sensor, charge pipe and forge DV to put little more boost on it. Actualy, i'm at 20.5psi and I want to try with 22psi. I think I'll have 550hp and maybe 740nm so the simple mass is necessary in my case. I gave my log to Russel and my fuel pressure is fine.
	Appreciate 0 Quote