White Smoke?

[joehirth]

If the turbo has completely gone then it would produce 0 boost and it would be worse than limp. Limp mode is detected, more often than not, with the MAP sensor, if the ECU requests 1bar of boost and the MAP sensor only reads 0.8bar then it will detect a boost leak and throw into limp.

Witha turbo oil seal going, depending on how bad, it may not effect performance as the oil is just a lubrication for the moving parts within a turbo, if it lost all oil flow and parts seized then it would effect the performance.

When does the warranty run out?

 

[lucifer666]

Mine just started doing this. 1.4TSI 35K. Its only happening when idleing

Although 4 things have changed over the last 5 days since it started.

1) Engine flush and oil change(oil level is fine btw, so is coolant)

2) 20l of "aquired" fuel was added into the tank. My friend had 20l also and his car is fine.

3) Ive done very short journeys through traffic with max speed of 30mph and duration of 10min.

4) I used a injector cleaner after my service which is an octane booster too, claims up to 6 octane points. Maybe the cause?


Hopfully after its just point 4 and after this tank of fuel is empty it will stop. Just had a new catalytic converter 3k ago too from previous problems.

Any ideas people?

 

[VRSLOZ]

4) I used a injector cleaner after my service which is an octane booster too, claims up to 6 octane points. Maybe the cause?

If you are using V-Power or something similar mate there is no need to use injector cleaner

 

[joehirth]

Injector cleaner at a guess.

 

[lucifer666]

It better be or i WILL actually cry and consider self harm. Its running great at the moment, better that ever before, no misfires, no problems and even got 224bhp on rollers (which i think is accurate because they did a standard run with no mods at 143bhp)

 

[oldtimer]

Just went to the dealer and they said nothing wrong with my car. The oil below the turbo was oil dust (?) which burned to give that bad smell and from the exhaust, giving the cloud effect.

They also did a oil check, they said its fine.

Car is running perfectly normal from a 50mile drive. Giving it the beans etc.

Surely that " oil dust " would have to be in the exhaust to give the smell and cloud effect. I think someone is telling porkies. Cars don't normally blow out clouds of white smoke and then suddenly be ok. Also you would know if your turbo had blown as the car would be rubbish power wise.
I would get another place to check it over, and ask them what oil dust is.

 

[FR_POWER]

The car is running Perfectly fine now......... It only happens when I turn the engine off on off on.......

 

[oldtimer]

It better be or i WILL actually cry and consider self harm. Its running great at the moment, better that ever before, no misfires, no problems and even got 224bhp on rollers (which i think is accurate because they did a standard run with no mods at 143bhp)

Another thing is ,do you know where that " aquired " fuel came from, I mean to be sure what was in it, not good to just tip anything in there.

 

[lucifer666]

Its esso 95 from a metal fuel can

 

[Jay1990]

Unless im missing something, why did you say "acquired", by that I though it was something like Red' Diesel (petrol alternative) not just, 95 octane instead of 98.

Jay

 

[VRSfab]

Hmmm it's not consistent all the time but when i start it and warm it up there is smoke coming out of it and it smells bad

nuff said

 

[queen]

OK, so I have a similar issue that seems to be getting worse. Almost every time now, after sitting at a light, and I start going before I shift (still in 1st gear) I blow a puff of white smoke from my exhaust. Same thing happens if I roll from 20mph except for a little less smoke in this case. In both cases I'm talking about driving normally. It lasts for about a second. It doesn't do it when I go wot or in any other conditions as a matter of fact. The smoke smells like I'm decat (only lighter) but I'm not (200cell HJS cat). No CEL.
Thinking it could be a bad pcv, I replaced it but it's not connected to the intake so it just blows into the atmosphere. Please note that it has always been like that, even my old pcv and there was never smoke. With the new pcv the car is still doing the same thing, so it's not that.
The coolant is at max.
Oil consumption is like it always has been.

The car is booked to be checked on Friday but I'm worried...
What do you think it could be? What should I check?
We'll be doing a compression test (already done one which was OK but has been over a month since).
Boost is fine, no issues, car drives like it should except for the smoke, no weird sounds.
Is my turbo dying?

 

[lucifer666]

Valve guide seals. My turbo went and was smoking constantly at idle, that was repaired. Smoke like yours and it was valve stem seals, which is down to high crank pressures for too long

 

[queen]

Will we be able to confirm that with a compression test?

 

[lucifer666]

Unlikely, may show a slight loss of compression but I doubt it. A leakdown test will be more beneficial.

 

[queen]

I see. And if it is that, how hard/costly is it to repair?

 

[AL90]

would a dealer try replace valve seals under warranty or would they just replace the engine?

 

[lucifer666]

a dealer would repair I would have thought. Seems more and more people are getting this problem. You should have noticed oil loss though. 500ml per 1k mine was consuming.

Idle the car for 15 min, then floor it in neutral and let go of throttle, you should see whitey blue smoke coming from tail pipe.

Also coast down hill in gear and re apply throttle gently and you should get smoke again

 

[queen]

Thing is, mine isn't drinking any.

But, my warranty has expired so if anything is out of the ordinary I like to check it immediately to prevent any major damage from happening.

So today, we run diagnostics and got the N75 error code in idle, we changed the valve with a new one. Unfortunately it didn't solve my problem.

We also checked my turbo for shaft play, it has some that could explain the white smoke. Given the fact that almost everyone is on vacations now, I'll have the turbo serviced first thing coming September.
Hopefully that will solve my issue. We'll see...

 

[lucifer666]

hmm weird. Does it smell like smokey bacon? Mine used no oil to begin with then level siddenly dropped.

These turbos do have shaft play, not along the axis but side to side, its part of the design. I would consider the wastegate actuator, its possible that its not opening the wastegate and therefore your turbo is always spinning. That has no sensor, so maybe its tricking the n75 valve.

Did you try what I asked you to try?