Misfire no CEL no Codes

[Lucas_R]

Thought this was your car when i first saw it: STAGE 2

VW JETTA 1.4 2013 83k

We... - Engine Carbon Clean NSW | Facebook

[jrpug407]

My misfires were all very even, when the piston cracked it suddenly ran like a bag of **** and the misfires on that one cylinder instantly skyrocketed. I think they have likley been there all along and are probably not reflective of an impending failure.

Even now following a rebuild and those numbers reset to zero they are slowly growing across all the cylinders.

Your stats seem to be reading a different value to mine (although note that I'm seeing them on the MFD using a PolarFIS), but I get instant misfires on one screen (which is misfires in the last 30 seconds or something like that, so it will show 1 then go back to zero) or total misfires (total number for all time) on another.

You're seeing averages, so they may move up and down, although there are plenty of zero's there... I doubt any of my would be.

What are you reading those with? It would be interesting to drag out my VCDS cable and see what mine are as a comparisson.

I'm using 2 apps Torque Pro OBD Fusion via Wi-Fi

btw I'm on a outstation trip (600km to and from) currently so running the car after decarbonizing was done the day before. I could have detected another issue here while accelerating on high speeds I found the car lurching and pulling back.

Not sure if these problems are related. Digging up online same says it could be a sign of a faulty sensor the N205 variable valve timing oil control valve solenoid.

others say it could be a driveter going bad. Just to which I will post here later is the obd 2 results from my road trip and it's not looking good there are misfires on all cylinders just no check engine light and error codes. Sigh this is getting frustrating .

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[jrpug407]

Can someone enlighten me test shows O2 sensors fail and surprisingly Cylinder 1 test failed too

Test report:
------------------
MID:$01 TID:$83
- O2 Bank 1 Sensor 1
Max: 1.92888 Min: 1.99046
Test result value: 0.81462
FAIL
----
MID:$02 TID:$81
- O2 Bank 1 Sensor 2
Max: 0.64514V Min: 0.6549V
Test result value: 0.63538V
FAIL
----
MID:$21 TID:$84
- Catalyst Monitor Bank 1
Max: 65,535 Min: 4,096
Test result value: 7,830
PASS
----
MID:$35 TID:$81
-
Max: 11° Min: 21°
Test result value: 21°
FAIL
----
MID:$3d TID:$8b
- EVAP Monitor (0.020")
Test incomplete or dependant test failed
--
MID:$41 TID:$85
- O2 Heater Monitor Bank 1 - Sensor 1
Max: 1,302.80005°C Min: 759.90002°C
Test result value: 819.79999°C
PASS
----
MID:$42 TID:$81
- O2 Heater Monitor Bank 1 - Sensor 2
Max: 1,568Ohm Min: 0Ohm
Test result value: 144Ohm
PASS
----
MID:$a2 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 1 Data
Max: 0Count Min: 34Count
Test result value: 27Count
FAIL
----
MID:$a3 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 2 Data
Max: 65,535Count Min: 0Count
Test result value: 3Count
PASS
----
MID:$a3 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 2 Data
Max: 65,535Count Min: 0Count
Test result value: 11Count
PASS
----
MID:$a4 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 3 Data
Max: 65,535Count Min: 0Count
Test result value: 3Count
PASS
----
MID:$a4 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 3 Data
Max: 65,535Count Min: 0Count
Test result value: 9Count
PASS
----
MID:$a5 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 4 Data
Max: 65,535Count Min: 0Count
Test result value: 2Count
PASS
----
MID:$a5 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 4 Data
Max: 65,535Count Min: 0Count
Test result value: 5Count
PASS
----


End of report.

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[The_Hawk]

Thought this was your car when i first saw it: Engine Carbon Clean NSW | Facebook

I think these cars get a lot of blow by messing up the intake. I keep meaning to look into an oil catch can.

I'm using 2 apps Torque Pro OBD Fusion via Wi-Fi

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I'm going to assume on your Android S7?

As an iPhone user I don't get Torque Pro (which is a damn shame!), although I do have a Nokia X6 with it installed if I ever feel the need. OBD Fusion is available on iOS too, but isn't something I really want to pay for since I have all the other tools already.

Why WiFi OBS adaptor by the way? I've always found that the bluetooth ones had far less lag, although that could just be iOS vs Android since I use bluetooth on Android and WiFi for iOS and I have three or four different adaptors I've tried at different times.

Can someone enlighten me test shows O2 sensors fail and surprisingly Cylinder 1 test failed too

Are you getting these results from Torque Pro or OBD Fusion? It's a different set of results I've not seen before. Do you have a screen shot of what you're running?

[jrpug407]

Attached is a screenshot of 2 identical misfire reports one at first scan and the other after the app refreshed.

it's strange torque shows cylinder 1 not ok at first then when refreshed the next one shows ok but with the same misfire counts.



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[The_Hawk]

I've done about 7,000km since the rebuild and my count is up to about 300 on each cylinder (total that is).

Rather annoyingly, the fancy bluetooth adaptor I have doesn't work with Torque Pro, but the WiFi one does, although when it comes to real time data it's bloody slow and laggy. Sadly I can't find my very cheap bluetooth one which worked flawlessly with almost zero lag

In nay case I've got green ticks across the board, but I really don't believe those misfire averages.... but hey, maybe it's better than I think, but the PolarFIS often shows a 1 here and there if you watch it, especially when cold and accelrating off from a set of lights. Far more than an average of zero anyway.

Remember that Torque Pro is a generic tool. ODB11 or VCDS (if you want to go all out) are the tools of choice.

Really though, I was tearing my hair out trying to understand why I was getting misfires but ultimatly accepted it's normal and stopped looking at it so much... (says the person with a dedicated polarFIS screen...)

Mode $06 report generated by Torque for Android
================================================

Test report:
------------------
MID:$01 TID:$83
- O2 Bank 1 Sensor 1
Max: 1.99882 Min: 0.30003
Test result value: 0.79047
PASS
----
MID:$01 TID:$84
- O2 Bank 1 Sensor 1
Max: 0.06997 Min: -0.06997
Test result value: 0.00296
PASS
----
MID:$02 TID:$81
- O2 Bank 1 Sensor 2
Max: 0.65002V Min: 0V
Test result value: 0.64026V
PASS
----
MID:$02 TID:$82
- O2 Bank 1 Sensor 2
Max: 1.26002V Min: 0.65002V
Test result value: 0.65978V
PASS
----
MID:$02 TID:$83
- O2 Bank 1 Sensor 2
Max: 0.24839V Min: 0V
Test result value: 0V
PASS
----
MID:$21 TID:$84
- Catalyst Monitor Bank 1
Max: 65,535 Min: 4,096
Test result value: 10,784
PASS
----
MID:$35 TID:$80
-
Max: 21° Min: 11°
Test result value: 20.76°
PASS
----
MID:$35 TID:$81
-
Max: 21° Min: 11°
Test result value: 20.76°
PASS
----
MID:$3d TID:$8b
- EVAP Monitor (0.020")
Max: 655.34998 Min: 0.1
Test result value: 1.22
PASS
----
MID:$41 TID:$85
- O2 Heater Monitor Bank 1 - Sensor 1
Max: 1,302.80005°C Min: 759.90002°C
Test result value: 819.90002°C
PASS
----
MID:$42 TID:$81
- O2 Heater Monitor Bank 1 - Sensor 2
Max: 1,132Ohm Min: 0Ohm
Test result value: 158Ohm
PASS
----
MID:$a2 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 1 Data
Max: 65,535Count Min: 0Count
Test result value: 2Count
PASS
----
MID:$a2 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 1 Data
Max: 65,535Count Min: 0Count
Test result value: 0Count
PASS
----
MID:$a3 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 2 Data
Max: 65,535Count Min: 0Count
Test result value: 2Count
PASS
----
MID:$a3 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 2 Data
Max: 65,535Count Min: 0Count
Test result value: 1Count
PASS
----
MID:$a4 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 3 Data
Max: 65,535Count Min: 0Count
Test result value: 2Count
PASS
----
MID:$a4 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 3 Data
Max: 65,535Count Min: 0Count
Test result value: 1Count
PASS
----
MID:$a5 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 4 Data
Max: 65,535Count Min: 0Count
Test result value: 2Count
PASS
----
MID:$a5 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 4 Data
Max: 65,535Count Min: 0Count
Test result value: 1Count
PASS
----


End of report.

[jrpug407]

Hey, Hawk thanks for sharing your results at least I now know how another vw might fare at the scan test. How's you fuel consumption?

OBD11 for the moment is a bit pricey for me, it would set me back about 400 bucks therefore not an option for now.

btw have you experienced any uneven acceleration like lurching and pulling back while cruising at high speeds?

My car is due to the garage on Monday will update you as to the outcome.

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[The_Hawk]

My fuel consumption is all over the place because it doesn't get driven. When it's only back and forth to the shops it can be as high as 12L/100km, on a trip that is down into the 7's. If I drive a decent distance it's more like 8.x around town.

I wouldn't say I've had any uneven acceleration or lurching and nothing at high speeds, so something doesn't sound right there.

[jrpug407]

Hi there Hawk and the rest,

Hope you guys are all ok it's quite unfortunate that we've been experiencing these crazy endtimes scenario, I believe this is the closest we who are currently alive have come to the end.

Never has anyone living experienced this sigh anyways just to update the grp I was scheduled to send my car in to investigate the misfires etc, when the pandemic went out of control.

The gov has enforced an MCO (movement control order) all businesses to close for 28days pending which if cases drop then they'll lift the ban praying and hoping it will.

I did more searching up found on a ford forum that cold or random misfies could be due to a failing valve spring. In another vw forum some say it could be due to a faulty PCV valve too. I'll try to paste those links here.

Till then guys stay safe take care of yourselves

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[jrpug407]

by the way I guess you guys from down under shld be delighted with the following news from VW

Volkswagen recalls Golf, Jetta, Passat, Polo and Caddy for DSG faults | CarAdvice

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