i recently popped my standard kkk turbo on my fabia so ive bought a 150pd hybrid. ive done compressions tests and all is ok, the car isnt using any oil or using any water but it is chucking out loads of white smoke when decelerating or when pulling off and changing gear. now my car isnt mapped yet to run this turbo but it has a awesome gti generic map on at the moment but i cant see this being the cause for my smoke screen! just waiting for somebody to pop out and say "TONIGHT MATTHEW, IM GOING TO BE!"

At the same time as the new turbo i fitted a egr delete and removed the anti stutter valve aswel. does anybody have any ideas on what could be causing this?

makes me want to take a lighter and a can of petrol to the stupid thing!!!

Thanks in advance!  

Very strange...... I always thought white smoke meant turbo issue, such as seals ???

It might be residual oil from when your turbo blew in the exhaust system burning off.

no oil went into the exhaust, it all went through the pipework. i cleaned it all out in a parafin parts bath in work. and cleaned the intercooler out with the jetwash and air lines to blow all the water out. it all was sat for over a week before being put back on so im pretty sure there wouldnt be any water left in the intercooler. i dont know what to do with it now.

So when the turbo blew there was no white smoke then? There was when mine went, the stuff was dripping out of the tailpipe. I just thought it could be residual oil left in the system.

i got the tiniest little bit of smoke out the back, i was doing about 115mph when it went but my car wouldnt start after that because the turbo locked solid as the cold side of the turbo shattered. since fitting the new turbo it started perfectly and runs perfectly just smokes :(

Pure white is also totally unburnt diesel, so perhaps look into an injector issue?

what i dont understand is the car was running perfectly before it popped the turbo. am i right in thinking the map wouldnt be causing this problem?

two question, if you start the car you get white smoke? does it smell of unburnt diesel or oil?

if it smells of unburnt diesel , you say the cold side of the turbo disintegrated? did any of the debris make it into the cylinders? damage the bores or valves?

it smells like a old truck from the fairground! and yeah it smashed to peices but it all got caught in the intercooler and spat some back into the air filter. no metal in the oil and nothing in the oil filter and it was absoluterly perfect of a compression test.

Have you checked the maf? My car was smoking badly a while ago when pulling away,ran a test on the maf and it was goosed. Changed it and all is well

it smells like a old truck from the fairground! and yeah it smashed to peices but it all got caught in the intercooler and spat some back into the air filter. no metal in the oil and nothing in the oil filter and it was absoluterly perfect of a compression test.

I have the same issue mate. Do u also find your car boosts when it wants to? Does it also smoke on idle?

little smoke on idle but boost is fine, car runs pretty well considering its not mapped yet. it mainly smoke when you put your foot on the accelerator i.e. when you change gear and press it again it gives a massive puff then or when you rev it while idling.

Have you checked the maf? My car was smoking badly a while ago when pulling away,ran a test on the maf and it was goosed. Changed it and all is well

which sensor is the maf? is that the one in the boost pipe behind the headlamp? and also how do i test this? i have vag com light on this laptop so i can look at figures, i just cant adjust anything.

Thanks

The maf is the sensor that screws to the airbox - it has a plug coming off it and looks like this

http://www.google.co.uk/imgres?q=pd130+maf&start=177&um=1&hl=en&biw=1400&bih=955&tbm=isch&tbnid=UUdGdkRaoKDyyM:&imgrefurl=http://www.audi-sport.net/vb/classifieds-discussion-area/164905-s3-apy-210-maf.html&docid=FiYIid2nVDmWMM&imgurl=http://www.audi-sport.net/vb/classifiedsImage.php%253Fu%253D12c569f23ea768b8b141f8a16191f5c6.jpg&w=2500&h=1875&ei=0_IYUPfiPIKT0QXZ_ICQCA&zoom=1&iact=hc&vpx=378&vpy=237&dur=2310&hovh=194&hovw=259&tx=176&ty=107&sig=108652072852059363629&page=6&tbnh=139&tbnw=185&ndsp=36&ved=1t:429,r:25,s:177,i:85

I took mine to a garage and got it tested on a diagnostics - it was peaking at 450mg/h at 3000rpm when it should be nearer 850-900mg/h. My smoke also smelt of diesel, so we think that the car was overfueling due to the faulty sensor thinking there was a lack of air.

Anyhoo, changed the sensor and it solved the problem

the maf could be a possibility! its sounding most likely with what your describing your car was doing and when my turbo went it spat alot of the turbo back into the air filter so it would of have to pass this sensor. the was a good chunk of turbo that got stuck in all the sensor housing. think ill have a play in a minute with the vagcom and see what i get. fingers crossed!!!

right, ive just been out to the car with my laptop to log the maf. ive logged it just sitting still and holding the revs at 3000rpm and then driving the car in 3rd from tickover to 3000rpm then 3000rpm to 4500rpm. can anybody make any sense of the log and tell me if anything is wrong?

maf driving.csvmaf.csv

Thanks

Edited 1 August, 201213 yr by vrsiain

Looking at that I'd say it was under performing mate - like I say mine peaked at 450mg @ 3000rpm when stationary, I'd say from that yours is peaking at about the same? (Mind Im no mechanic and the diagnostics was much more simple than yours lol) but they're meant to be at about 900mg?

Also when your turbo went and you found bits of it in the sensor housing is it possible that some oil could have got there too? As oil can kill these sensors - thats why people are wary of using K&N filters as they're oily and break the mafs. Coincidentally I fitted a cone filter about 2 weeks before my maf went...

New mafs are about £90, might be worth a punt before you look at more expensive things? It took mine about a day or 2 to return to normal

Erm, possibly maybe yeah. Thinking of it now i forgot to clean that pipe before i built the car up so i sprayed some carb cleaner in it with the sensor still attached. I had loads of little peices of metal and 1 big peice go up that pipe. I wanna wait for sumbody to confirm its that sensor before i change it. But skint at the moment after spending £1000 on a turbo and gaskets and what not an then anothe £625 on a clutch and flywheel and still need a map. Thank god for a big overdraft! Lol

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Erm, possibly maybe yeah. Thinking of it now i forgot to clean that pipe before i built the car up so i sprayed some carb cleaner in it with the sensor still attached. I had loads of little peices of metal and 1 big peice go up that pipe. I wanna wait for sumbody to confirm its that sensor before i change it. But skint at the moment after spending £1000 on a turbo and gaskets and what not an then anothe £625 on a clutch and flywheel and still need a map. Thank god for a big overdraft! Lol

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What about trying my maf on it? Would they be the same with mine being an asz engine though?

we swapped MAF sensors tonight and its made not a blind bit of difference. going to keep them swapped for a day or two and see if the car adjusts but i cant see this being the fix. im starting to think it has to be something to do with the turbo now :( i was hoping it wouldnt be as i dont want to have to take this off again and be without a car for a few weeks again!!

Just looked at your logs. Could do with running it again but only log 1 at a time. That way you get a better sample rate with more actuate figures.

So log 3 from 1500 to redline. 11 for boost. Post them back up.

Looking at yours however the MAF figures look ok for a standard pd150 turbo but for a hybrid I'd expect higher readings.

Also 1.7bar for a standard remap. Funny your turbo went lol.

Its a 150pd hybrid stage 2 but it has a generic awesome gti remap for the standard turbo. Nor mapped for the hybrid yet as i want to get to the bottom of this smoking first. Ill log then 2 things tomorrow once my laptop is charged up and post them up. Thanks for the help!

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No problem.

I've got a log from a stage 2 pd130 turbo and it would max out the diagnostic MAF limit (1249.5) to about 3750rpm. That was running a generic map for the standard turbo.

But get your logs tomorrow and post them up.

Channel 3 for MAF

Channel 11 for boost

Channel 1 for IQ Duration

sorry i havent put the logs up, ive not been on for a few days. ive noticed recently that my oil has gone down :( i took my exhaust off and there is oil being put down there from the turbo. good thing about this is i now know what my smoking is now. just need to make sure its nothing ive done to be causing the leak or if it just is unluckily a duff seal in the turbo. probly rarely it happens but it is possible.

Bad luck :(