Rough running cylinder no faults

335dlci · 10-05-2016, 09:59 PM

The last few days I have been having a rough run at idle. No faults for cylinder 6 but the smother runnings reached almost 4 on the test plan via ista. I also see the SR values not so close to 0 during steasy cruise. Any idea? Injector failure. I have methanol and jbd on. And have it on my car for about 2.5 years.

335duff · 10-06-2016, 12:34 AM

How do you know you have rough cylinder? What are your symptoms? How many miles? There are a slightly less than infinite amount of things that seem to cause rough running. What previous service has been performed on the car?

When my maf goes my car runs like shit but has no codes.

Any scr fault seems to make it run like shit

Could it be either of those?

Andrew@FixMyVW · 10-06-2016, 08:06 AM

Quote:

Originally Posted by 335dlci

The last few days I have been having a rough run at idle. No faults for cylinder 6 but the smother runnings reached almost 4 on the test plan via ista. I also see the SR values not so close to 0 during steasy cruise. Any idea? Injector failure. I have methanol and jbd on. And have it on my car for about 2.5 years.

Does it run rough with the a/c off?

335dlci · 10-06-2016, 10:23 AM

Quote:

Originally Posted by Andrew@FixMyVW

Does it run rough with the a/c off?

Yeah. Wth all consumers off.

335dlci · 10-06-2016, 10:27 AM

Quote:

Originally Posted by 335duff

How do you know you have rough cylinder? What are your symptoms? How many miles? There are a slightly less than infinite amount of things that seem to cause rough running. What previous service has been performed on the car?

When my maf goes my car runs like shit but has no codes.

Any scr fault seems to make it run like shit

Could it be either of those?

I could feel it like a slight misfire. I'm at 70k. I am using ista's test plan for smooth running to find the current conditon and values of cylinder 6. All my services are up to date. I have never had CBU. MAF has been replaced at approx 15k. No faults for the maf. Only I can see cylinder 6 is running higher than the other cylinders. I'll take a screenshot of it. Only started happening the day we arrived in the Seattle area after a 20 hour non stop drive from socal.

335dlci · 10-07-2016, 12:01 PM

335dlci · 10-07-2016, 12:02 PM

It's not out of range but it has been abnormaly rough at udle.

ninja_zx11 · 10-07-2016, 01:14 PM

Are you getting rough idle all the times or only when the engine is cold?

335dlci · 10-07-2016, 03:48 PM

Quote:

Originally Posted by ninja_zx11

Are you getting rough idle all the times or only when the engine is cold?

it's more noticable when cold but still can be felt when warm.

lnxguy · 10-07-2016, 04:34 PM

For shits and gigs run a can of Diesel Purge through the engine.

JOHNNYBRAVO1 · 10-07-2016, 09:23 PM

Im thinking injector is going or shot. I've replaced all 6 for lost boost and power and boom power came back. Andrews been threw that also.

335dlci · 10-07-2016, 11:26 PM

Quote:

Originally Posted by JOHNNYBRAVO1

Im thinking injector is going or shot. I've replaced all 6 for lost boost and power and boom power came back. Andrews been threw that also.

Hopefully it makes it back 1100 miles before it fails lol. I'm on travel in Seattle from Los Angeles.

JOHNNYBRAVO1 · 10-08-2016, 12:30 AM

Hope the German gods look over you to make it back. 1100 ouch.

335dlci · 10-08-2016, 10:43 AM

Quote:

Originally Posted by JOHNNYBRAVO1

Hope the German gods look over you to make it back. 1100 ouch.

Drover up here non stop

JOHNNYBRAVO1 · 10-08-2016, 07:56 PM

Niceeee, German gods listened to your needs

335dlci · 10-08-2016, 09:36 PM

Quote:

Originally Posted by JOHNNYBRAVO1

Niceeee, German gods listened to your needs

Well it has been running rough since I did the 1100 mile drive, since Sunday. Driving back to socal early tmw morning.

Yozh · 10-08-2016, 11:22 PM

May try taking your JBD off for the drive back South and see if things will change.

PS: I did NorCal to SEA overnight in the summer - boring drive.

Sti581 · 11-23-2016, 07:56 PM

Anything come out of this? My buddy has issues similar if not identical to this. Curious what this is? There are no codes at all. How can you tell if the MAF is bad? Weird thing is that I unplugged it from the car while it was running and it didn't change anything the car ran the same. Do you think it's that?

335dlci · 11-24-2016, 10:13 AM

Quote:

Originally Posted by Sti581

Anything come out of this? My buddy has issues similar if not identical to this. Curious what this is? There are no codes at all. How can you tell if the MAF is bad? Weird thing is that I unplugged it from the car while it was running and it didn't change anything the car ran the same. Do you think it's that?

I believe it was either winterized fuel and/or a bad batch of diesel while I was up in the PNW. I haven't had a problem since a tank after that one tank of fuel. Dish I had more to add but it was very weird that it was a slight hesitation kind of stumble.

10-05-2016, 09:59 PM	#1
335dlci Lieutenant Colonel 277 Rep 1,574 Posts Drives: 335d Join Date: Apr 2014 Location: Socal iTrader: (0)	Rough running cylinder no faults The last few days I have been having a rough run at idle. No faults for cylinder 6 but the smother runnings reached almost 4 on the test plan via ista. I also see the SR values not so close to 0 during steasy cruise. Any idea? Injector failure. I have methanol and jbd on. And have it on my car for about 2.5 years.
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10-06-2016, 12:34 AM	#2
335duff Private First Class 25 Rep 114 Posts Drives: 2011 335d E90 Join Date: May 2015 Location: United States iTrader: (0)	How do you know you have rough cylinder? What are your symptoms? How many miles? There are a slightly less than infinite amount of things that seem to cause rough running. What previous service has been performed on the car? When my maf goes my car runs like shit but has no codes. Any scr fault seems to make it run like shit Could it be either of those?
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10-07-2016, 12:01 PM	#6
335dlci Lieutenant Colonel 277 Rep 1,574 Posts Drives: 335d Join Date: Apr 2014 Location: Socal iTrader: (0)
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10-07-2016, 12:02 PM	#7
335dlci Lieutenant Colonel 277 Rep 1,574 Posts Drives: 335d Join Date: Apr 2014 Location: Socal iTrader: (0)	It's not out of range but it has been abnormaly rough at udle.
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10-07-2016, 01:14 PM	#8
ninja_zx11 Private First Class 89 Rep 183 Posts Drives: X5 diesel 2009 Join Date: Jan 2014 Location: Langley BC,Canada iTrader: (0)	Are you getting rough idle all the times or only when the engine is cold?
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10-07-2016, 04:34 PM	#10
lnxguy Lieutenant Colonel 357 Rep 1,723 Posts Drives: 2009 335D Join Date: Jun 2016 Location: Barrie iTrader: (1)	For shits and gigs run a can of Diesel Purge through the engine. __________________ '09 335D
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10-07-2016, 09:23 PM	#11
JOHNNYBRAVO1 NY BRAVEST 47 Rep 231 Posts Drives: 2010 Monaco blue, 335D Join Date: Mar 2016 Location: NEW YORK, LONG ISLAND iTrader: (0)	Im thinking injector is going or shot. I've replaced all 6 for lost boost and power and boom power came back. Andrews been threw that also.
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10-08-2016, 12:30 AM	#13
JOHNNYBRAVO1 NY BRAVEST 47 Rep 231 Posts Drives: 2010 Monaco blue, 335D Join Date: Mar 2016 Location: NEW YORK, LONG ISLAND iTrader: (0)	Hope the German gods look over you to make it back. 1100 ouch.
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10-08-2016, 07:56 PM	#15
JOHNNYBRAVO1 NY BRAVEST 47 Rep 231 Posts Drives: 2010 Monaco blue, 335D Join Date: Mar 2016 Location: NEW YORK, LONG ISLAND iTrader: (0)	Niceeee, German gods listened to your needs
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10-08-2016, 11:22 PM	#17
Yozh Colonel 870 Rep 2,615 Posts Drives: 2011 335d M-Sport Join Date: Mar 2014 Location: Wet Coast iTrader: (4)	May try taking your JBD off for the drive back South and see if things will change. PS: I did NorCal to SEA overnight in the summer - boring drive.
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11-23-2016, 07:56 PM	#18
Sti581 Second Lieutenant 41 Rep 241 Posts Drives: 2017 F80 ZCP 6MT M3 Join Date: Apr 2016 Location: Houston, TX iTrader: (1)	Anything come out of this? My buddy has issues similar if not identical to this. Curious what this is? There are no codes at all. How can you tell if the MAF is bad? Weird thing is that I unplugged it from the car while it was running and it didn't change anything the car ran the same. Do you think it's that?
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