English- 1.4 passat problem

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estonian3
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English- 1.4 passat problem

Beitrag von estonian3 » 13.03.2019 08:20

So my little passat is having problems.
Its 2010 b6 with 318thousand mileage

Problem is having random misfires in 1 and 4 cilynder and when it occurs it puts yellow engine light on dashboard, i switched sparkplugs and those ignition pods that go onto spark plugs and misfire didnt move. To be clear i changed gas sparkplugs as i understand that there are petrol sparkplugs and all also somewhere.
And when i accelerate a bit harder then it stalls for a second and turns cng off and goes to casoline, right when i take my foot of gas then it goes back to cng..
I can give diagnostic error codes later tonight but any ideas? Or anyone had similar probem?

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bljack
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Re: English- 1.4 passat problem

Beitrag von bljack » 14.03.2019 06:51

Hi estonian,

first there are no different sparkplugs for cng and gasoline; the same four sparkplugs are used on both fuels.

But there are of course different injectors for cng and gasoline, so there might be a problem with faulty cng injectors. (If it only stalls at higher throttle, it might get too little cng, because you wrote on gasoline it is all fine.)

You could check fueltrimm at high throttle on cng and gasoline to verify this theory. It should get out of range on cng and let the engine run lean.
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anacronataff
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Re: English- 1.4 passat problem

Beitrag von anacronataff » 14.03.2019 10:52

Hallo estonian3,
estonian3 hat geschrieben:
13.03.2019 08:20
(...) as i understand that there are petrol sparkplugs and all also somewhere.(...)
No, there are just 4 sparkplugs. Helpfull is SSP425 and SSP359 (and maybe also SSP373)
estonian3 hat geschrieben:
13.03.2019 08:20
(...) And when i accelerate a bit harder then it stalls for a second and turns cng off and goes to casoline, right when i take my foot of gas then it goes back to cng..(...)
What happens if you only drive on gasoline? Everythink ok? (You can switch from cng to gasoline for example with vcds: https://www.youtube.com/watch?v=5bJWnTQ9Urw)
Passat EF 1.4TSI DSG MJ02/2010: 243600km (2246km Umweg wg Tanken), 5.53 €/100km, Gesamt: 28.58 €/100km * Service Intervalle * CNG-Reichweiten * CNG-Tankrekorde mit 21kg Tanks * Fotos und eigene POI's mit Navigon

estonian3
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Registriert: 09.02.2017 13:52

Re: English- 1.4 passat problem

Beitrag von estonian3 » 14.03.2019 14:26

It works really bad running on gasoline.. rpm needle jumps a bit when idle and i can feel vibration.. but as soon it turns to cng then its smooth as fuck 😄

Oh i did not know about those sparkplug things, i always had my doubts.. put does it have 2 set of injectors then?

Can i see injectors work with vcds? Or the only way is to remove them and let professional test them..

estonian3
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Re: English- 1.4 passat problem

Beitrag von estonian3 » 14.03.2019 14:44

Effect upon failure
As soon as one gas injection valve fails, the engine control unit switches to back-up petrol mode.
S373_082

That maybe might be the problem? But as i understand that it will show faulty injector problem etc
But it hasnt done that, only cylinder problems..
Oh and ive seen fault code saying that cng gas is too rich or smthing..

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bljack
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Re: English- 1.4 passat problem

Beitrag von bljack » 15.03.2019 07:27

Yes, it has two sets of injectors.

If it says it is running too rich, it can be a problem with a leaky gasoline injector.
You could first test running on gasoline with the cng deactivated. If you unplug the 12V at the pressure regulator, the pressure in the cng-system will lower to zero, if a cng injector is leaky. After a few minutes (hours?) the engine might run better on gasoline; if you still have problems at idle but not at higher loads, a gasoline injector might be leaky.

Unfortunatly I don't know if there is an easy way to do the same test with the gasoline-system deactivated; maybe anacronataff knows.

By the way: are there any problems with starting the engine in the morning? Does it need a longer time for the first start in the morning?
Meistens mit meinem ecoup und manchmal mit ihrem Leon ST TGI unterwegs.

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anacronataff
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Re: English- 1.4 passat problem

Beitrag von anacronataff » 15.03.2019 10:50

PLEASE read and understand SSP 425!

Sparkplugs and ignition pods are realy ok?!
Then I think you have two problems:
First:
estonian3 hat geschrieben:
14.03.2019 14:26
It works really bad running on gasoline (...) but as soon it turns to cng then its smooth (...)
Second:
estonian3 hat geschrieben:
13.03.2019 08:20
(...) And when i accelerate a bit harder then it stalls for a second and turns cng off and goes to gasoline (...)
To First Problem: One or more gasoline injector failures
To Secord Problem: One or more cng injector failures

I had both problems. You can see here how to exchange cng injector and gasoline injector.
estonian3 hat geschrieben:
14.03.2019 14:26
(...) Can i see injectors work with vcds? Or the only way is to remove them and let professional test them.
You can not check injectors with vcds. Just see misfires. And you can "professional test" gasoline injector, but once you have removed gasoline injectors, you have to build in NEW gasoline injectors, because gasket of the old ones won't work any more. So "professional test" gasoline injector is wasting money.
Passat EF 1.4TSI DSG MJ02/2010: 243600km (2246km Umweg wg Tanken), 5.53 €/100km, Gesamt: 28.58 €/100km * Service Intervalle * CNG-Reichweiten * CNG-Tankrekorde mit 21kg Tanks * Fotos und eigene POI's mit Navigon

estonian3
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Registriert: 09.02.2017 13:52

Re: English- 1.4 passat problem

Beitrag von estonian3 » 15.03.2019 15:32

So im using vcds atm to see what errors i have
013154 cylinder 1 misfire detected during nat gas operation

013157 cylinder 4 misfire detected during nat gas operation

Just a reminder that it cant be sparkplug or the thing what goes on top of spark plug

008567 bank 1 system too lean off idle

So theres a chance that both cng and petrol injectors are faulty?
It doesnt seem to take petrol while running on cng, well if it is then so little that i cant notice it..

And my morning cold starts are fine, Like a second maybe? Well my morning start is the same with warm engine start. On occasion it takes just a little bit more time to start but thats rare and it has been with warm engine not cold..

estonian3
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Registriert: 09.02.2017 13:52

Re: English- 1.4 passat problem

Beitrag von estonian3 » 15.03.2019 15:39

Just ran a scan and found this on
01809 actuating motor for temperature flap left (v158)

Whats that?

estonian3
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Re: English- 1.4 passat problem

Beitrag von estonian3 » 15.03.2019 19:30

But i messed around with vcds a bit..
I changed the fuel consumption from cng to petrol and it started to misbehave again, vibration and all..
But i didnt know what to look when its doing that, i tryed to look like fuel rail job or injectors or smth but couldnt find anything useful

I watched 001 and it showed that lamda was 0 but later watching 032 and 033 it showed different numbers so i think its working..

Also didnt detect any misfires

Also 106 fuel rail pressure when engine was running was around 87bar(cng mode) and when i turned the engine off and went to 106 again then that number was slowly going bigger.. as it should be? I googled that if the number isnt going bigger then theres a leak in injectors, maybe i should have done the same test but with petrol mode?

Anyway can someone tell me like step to step what to look and do in vcds, i bought it but im not very familiar worh it yet

MiniDisc
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Re: English- 1.4 passat problem

Beitrag von MiniDisc » 16.03.2019 01:16

estonian3 hat geschrieben:
15.03.2019 15:39
Just ran a scan and found this on
01809 actuating motor for temperature flap left (v158)

Whats that?
This error comes from the control Module 8 ... Climatisation. Has nothing to do with your engine Problem.

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anacronataff
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Re: English- 1.4 passat problem

Beitrag von anacronataff » 16.03.2019 09:48

estonian3 hat geschrieben:
15.03.2019 15:32
(...)Just a reminder that it cant be sparkplug or the thing what goes on top of spark plug(...)
Are you realy sure?
estonian3 hat geschrieben:
15.03.2019 15:32
(...)008567 bank 1 system too lean off idle
So theres a chance that both cng and petrol injectors are faulty?(...)
yes

So:
Delete all failures. Run on cng. Read all fialure and post here.

Then:
Delete all failures. Run on gasonline. Read all fialure and post here.
Passat EF 1.4TSI DSG MJ02/2010: 243600km (2246km Umweg wg Tanken), 5.53 €/100km, Gesamt: 28.58 €/100km * Service Intervalle * CNG-Reichweiten * CNG-Tankrekorde mit 21kg Tanks * Fotos und eigene POI's mit Navigon

estonian3
Beiträge: 19
Registriert: 09.02.2017 13:52

Re: English- 1.4 passat problem

Beitrag von estonian3 » 17.03.2019 09:44

Well some time ago when i got that cylinder 4 failure i switched 3rd and 4th sparkplug and 2nd and 4th that thing ehat goes on top of sparkplug and the fault didnt move, so i assume that cant be those things, also sparkplugs are like half a year old and in visual look they are nice snd good

Right now i have been driving like ~150km and motor light hasnt turned on, so im guessing that problem hasnt occured yet but thats how it is, it comes randomly, but it works unevenly in petrol mode so i know that theres somesthing with that

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bljack
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Re: English- 1.4 passat problem

Beitrag von bljack » 18.03.2019 09:24

The error "running lean" is something i can't place right now. If the injectors are faulty / leaky, the mixture would be rich but not lean because of extra fuel from the other system.

As anacronataff mentioned: try to isolate errors from cng and gasoline with the shown way. You might also check fuel-pressures from the "not used system", if they decline; this might be a hint for a leaky injector.

For the cng-injecotrs a test was shown in the forum. You can put a balloon over them and wait some time. If the injector is leaky, it will inflate cng to the balloon.
Meistens mit meinem ecoup und manchmal mit ihrem Leon ST TGI unterwegs.

VW ecoup: Spritmonitor & Forum
Seat Leon ST TGI: Spritmonitor & Forum

estonian3
Beiträge: 19
Registriert: 09.02.2017 13:52

Re: English- 1.4 passat problem

Beitrag von estonian3 » 24.03.2019 09:32

So i drove yesterday like 100km and when i started car today it sayd that coolant was low, so i checked uner hood and it was almost all gone.. i poured like 0.5L coolant there to get it normal level..

But i didnt saw like smoke or aything last night and car didnt act funny, so i dont know where did it go..
Cant see any markings on the ground also so i dontknowif engine is eating it or it leaks.. have to drive today also ~150km so later i can see that has the level dropped or smthing..

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