Misfire problem

335iNavyGuy · 01-31-2015, 02:12 AM

Ok, So ive read about 20 threads and i just want to ask this.

What can cause a misfire on a SINGLE cylinder? (yes ive read the sticky)

Ive replaced all spark plugs, and ive replaced the Coil Pack and Fuel Injector on the misfiring cylinder. and yes i HAVe recoded the fuel injector properly.

Before it would only misfire under high pressure close to WOT

Then it would misfire under about 50% throttle

Now it constantly misfires and wont stop, clearing codes does NOT stop misifre, neither does restarting.

Ideas? I dont want to replace everything i honestly cant afford it, so more insight would be great!

Current Mods:
Jb4 G5, Catless Dp's, Cold air intake, CP / BOV, Remus race exhaust.

MISFIRe happens on MAP 0, so with the chip basically off.

Exxxtacy · 01-31-2015, 02:23 AM

i am having VERY similar problems. what codes do you have?

335NJ · 01-31-2015, 02:25 AM

Quote:

Originally Posted by 335iNavyGuy

Ok, So ive read about 20 threads and i just want to ask this.

What can cause a misfire on a SINGLE cylinder? (yes ive read the sticky)

Ive replaced all spark plugs, and ive replaced the Coil Pack and Fuel Injector on the misfiring cylinder. and yes i HAVe recoded the fuel injector properly.

Before it would only misfire under high pressure close to WOT

Then it would misfire under about 50% throttle

Now it constantly misfires and wont stop, clearing codes does NOT stop misifre, neither does restarting.

Ideas? I dont want to replace everything i honestly cant afford it, so more insight would be great!

Current Mods:
Jb4 G5, Catless Dp's, Cold air intake, CP / BOV, Remus race exhaust.

MISFIRe happens on MAP 0, so with the chip basically off.

Long shot, but when was your last walnut blast performed?

j23a45m · 01-31-2015, 02:35 AM

Quote:

Originally Posted by 335NJ

Long shot, but when was your last walnut blast performed?

not the issue because @[Exxxtacy] has the same issue and just had a blast 2k miles ago

Seven11 · 01-31-2015, 10:43 AM

Quote:

Originally Posted by j23a45m

not the issue because @[Exxxtacy] has the same issue and just had a blast 2k miles ago

I would worry about what your car is doing and forget what Exxxtacy did to his car

j23a45m · 01-31-2015, 01:20 PM

Quote:

Originally Posted by Seven11

I would worry about what your car is doing and forget what Exxxtacy did to his car

Why might that be? I'm not having any issues we're trying to figure out what the Op and Exxxtacy is experiencing. But thanks for your input

335iNavyGuy · 01-31-2015, 01:25 PM

Quote:

Originally Posted by j23a45m

Why might that be? I'm not having any issues we're trying to figure out what the Op and Exxxtacy is experiencing. But thanks for your input

Yes but i could need a walnut blast, I appreciate all the input, I am going to try the blast today.

335NJ · 01-31-2015, 01:44 PM

Quote:

Originally Posted by 335iNavyGuy

Yes but i could need a walnut blast, I appreciate all the input, I am going to try the blast today.

I hope that ends up helping. If the valves for that cylinder are caked up and not moving freely I'd assume that'll cause a misfire since less air is coming in.

Morpheus · 01-31-2015, 01:46 PM

try cleaning the tmap sensor. easy to get to. I had the same symptoms. Nothing else worked including the walnut blast.

j23a45m · 01-31-2015, 01:49 PM

Quote:

Originally Posted by Morpheus

try cleaning the tmap sensor. easy to get to. I had the same symptoms. Nothing else worked including the walnut blast.

Exactly what I told Exxxtacy about a hour ago. He is doing that now and he should chime in with results

Wolf 335 · 01-31-2015, 01:54 PM

My issue with missfire was under heavy load and it was due to the spark plug in cylinder 6.

Did you use oe bmw plugs? Was gapping correct?

Same for injectors, were they oe bmw?

Morpheus · 01-31-2015, 02:20 PM

I could be wrong but I thought he said he had changed plugs and coils?

335iNavyGuy · 01-31-2015, 03:21 PM

Quote:

Originally Posted by Morpheus

try cleaning the tmap sensor. easy to get to. I had the same symptoms. Nothing else worked including the walnut blast.

going to actually just swap it out with another one that i know works.

And then im going to do the walnut blast just because.

Quote:

Originally Posted by Wolf 335

My issue with missfire was under heavy load and it was due to the spark plug in cylinder 6.

Did you use oe bmw plugs? Was gapping correct?

Same for injectors, were they oe bmw?

And i changed all spark plugs, not with OE but with good well gapped spark plugs. And i replaced all coils, and i only replaced ONE injector. And the misfire has been on Cylinder 3 the whole time

All4bigAl · 01-31-2015, 03:37 PM

Here is a link to my cylinder 4 misfire woes if it helps...

http://www.e90post.com/forums/showthread.php?t=1039184

What index numbers are your injectors?

335iNavyGuy · 01-31-2015, 05:32 PM

Quote:

Originally Posted by All4bigAl

Here is a link to my cylinder 4 misfire woes if it helps...

http://www.e90post.com/forums/showthread.php?t=1039184

What index numbers are your injectors?

I'm in the middle of cleaning the valves, they are REALLY bad, i just got too them. Im 99% sure thats my problem with how shitty these are.

Pics here

Morpheus · 01-31-2015, 05:40 PM

I hope you're right. Good luck. It's frustrating when you can't even pass cars on the highway without going into limp mode. It got to where I was driving around with the cobb plugged in so I could clear the limp mode.

335iNavyGuy · 01-31-2015, 05:44 PM

Quote:

Originally Posted by Morpheus

I hope you're right. Good luck. It's frustrating when you can't even pass cars on the highway without going into limp mode. It got to where I was driving around with the cobb plugged in so I could clear the limp mode.

Mine was worse, it turned into a constant misfire, even when i reset codes and restarted still misfire.

07chupacabra · 01-31-2015, 05:51 PM

I think injectors need to be replaced in bank 1/2 sets if the part numbers or revisions are different.

Hopefully someone else can confirm this.

335iNavyGuy · 01-31-2015, 06:10 PM

Quote:

Originally Posted by 07chupacabra

I think injectors need to be replaced in bank 1/2 sets if the part numbers or revisions are different.

Hopefully someone else can confirm this.

Hm yeah i havent heard that, but i reprogrammed the single injector so idk

Wolf 335 · 01-31-2015, 06:16 PM

Quote:

Originally Posted by 07chupacabra

I think injectors need to be replaced in bank 1/2 sets if the part numbers or revisions are different.

Hopefully someone else can confirm this.

I am pretty sure you are correct in this regard. cylinder 1, 2, 3 together and 4, 5, 6 together

Seven11 · 02-01-2015, 03:40 AM

Quote:

Originally Posted by j23a45m

Why might that be? I'm not having any issues we're trying to figure out what the Op and Exxxtacy is experiencing. But thanks for your input

I thought u were OP, I read that OP never did walnut blast

Quote:

Originally Posted by 335iNavyGuy

Yes but i could need a walnut blast, I appreciate all the input, I am going to try the blast today.

Yea that's what I was trying to say

NEFARIOUS · 02-01-2015, 03:18 PM

I was almost going to say DISA valve since I had similar symptoms, but just realized you had an N54.

01-31-2015, 02:12 AM	#1
335iNavyGuy Colonel 206 Rep 2,349 Posts Drives: 07 N54 E92 Join Date: May 2013 Location: San Diego CA iTrader: (3)	Misfire problem Ok, So ive read about 20 threads and i just want to ask this. What can cause a misfire on a SINGLE cylinder? (yes ive read the sticky) Ive replaced all spark plugs, and ive replaced the Coil Pack and Fuel Injector on the misfiring cylinder. and yes i HAVe recoded the fuel injector properly. Before it would only misfire under high pressure close to WOT Then it would misfire under about 50% throttle Now it constantly misfires and wont stop, clearing codes does NOT stop misifre, neither does restarting. Ideas? I dont want to replace everything i honestly cant afford it, so more insight would be great! Current Mods: Jb4 G5, Catless Dp's, Cold air intake, CP / BOV, Remus race exhaust. MISFIRe happens on MAP 0, so with the chip basically off. __________________ 07 E92 Jb4-G5 - Sport Exhaust - Titek BOV BBS Lm reps - AFE dual cone intake
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01-31-2015, 02:23 AM	#2
Exxxtacy Instagram @kyle_e92 13 Rep 187 Posts Drives: e92 335xi Join Date: Sep 2013 Location: Ephrata, PA iTrader: (1) Garage List 2008 BMW 335xi [0.00]	i am having VERY similar problems. what codes do you have? __________________ 6MT l AWD l MHD l DCI l VRSF DP l ECS BOV l CUSTOM 3" CATBACK l 7" VRSF intercooler l H&R Coilovers
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01-31-2015, 01:46 PM	#9
Morpheus Captain 25 Rep 941 Posts Drives: 335i Titanium Silver Join Date: Sep 2008 Location: Cockaigne iTrader: (1)	try cleaning the tmap sensor. easy to get to. I had the same symptoms. Nothing else worked including the walnut blast.
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01-31-2015, 01:54 PM	#11
Wolf 335 Brigadier General 2341 Rep 3,541 Posts Drives: 2007 E92 335i Join Date: Aug 2012 Location: GTA - Greater Toronto Area iTrader: (0)	My issue with missfire was under heavy load and it was due to the spark plug in cylinder 6. Did you use oe bmw plugs? Was gapping correct? Same for injectors, were they oe bmw?
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01-31-2015, 02:20 PM	#12
Morpheus Captain 25 Rep 941 Posts Drives: 335i Titanium Silver Join Date: Sep 2008 Location: Cockaigne iTrader: (1)	I could be wrong but I thought he said he had changed plugs and coils?
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01-31-2015, 03:37 PM	#14
All4bigAl Private 6 Rep 63 Posts Drives: E93 M3, F10 550, E70 X5 Join Date: Sep 2014 Location: Wisconsin iTrader: (1)	Here is a link to my cylinder 4 misfire woes if it helps... http://www.e90post.com/forums/showthread.php?t=1039184 What index numbers are your injectors?
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01-31-2015, 05:40 PM	#16
Morpheus Captain 25 Rep 941 Posts Drives: 335i Titanium Silver Join Date: Sep 2008 Location: Cockaigne iTrader: (1)	I hope you're right. Good luck. It's frustrating when you can't even pass cars on the highway without going into limp mode. It got to where I was driving around with the cobb plugged in so I could clear the limp mode.
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01-31-2015, 05:51 PM	#18
07chupacabra First Lieutenant 41 Rep 354 Posts Drives: 07 E92 335i Join Date: Sep 2014 Location: Northern VA iTrader: (0)	I think injectors need to be replaced in bank 1/2 sets if the part numbers or revisions are different. Hopefully someone else can confirm this.
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