Has anyone else decatted a Fabia vRS? And if so, have you suffered any technical problems as a result.

If you dont want to post publically, please pm me. Cheers.

Has anyone else decatted a Fabia vRS? And if so' date=' have you suffered any technical problems as a result.

If you dont want to post publically, please pm me. Cheers.[/quote']

Are they still adament that this is the cause of your problem Dave?

Are they still adament that this is the cause of your problem Dave?

Skoda Technical heve been called upon by them, and thats one of the suggestions. They are suggesting that by having no cat, a lack of back pressure may have caused the new turbo to fail. I'm just trying to establish if this is in fact a possible cause, or indeed a possible get out of jail card for Skoda.

Yes, and no.

And for the record, this is both with a simple pipe bolted in place of the cat (ran for at least 2 years+ on my pd100/some time after the conversion) and more recently a single stainless pipe with no exhaust fittings at all.

No problems, plenty of efficient exhaust expulsion.

I'm struggling to work out how the hell a decat can affect anything engine related. I would have thought it would an exhaust (slightly) more free-flowing therefore making it easier (slightly) to get exhaust gases out. (the "blow through a straw, then blow while pinching it" syndrome)

If I had to post one tiny problem with my powerflow decat pipe was that the fitter didn't do up the bolts on the tail end of the pipe all that tight, so one time I looked under the car and evidence of black smoke having blowin out of the join and covering the chassis. A spanner solved this issue.

Having just read about the lack of back pressure. What a crock! SURELY that can't be true? TDIs don't need back pressure like a petrol usually does I thought? Everyone on TDIclub says that the best exhaust is the one which gets the emissions out as fast as possible. Reason #1 I went for my current unorthodox exhaust system.

Skoda Technical heve been called upon by them, and thats one of the suggestions. They are suggesting that by having no cat, a lack of back pressure may have caused the new turbo to fail. I'm just trying to establish if this is in fact a possible cause, or indeed a possible get out of jail card for Skoda.

Do you feel like an idiot mate. I am pretty sure that they must think you look like one!!!

So has the new turbo failed?

If I were you I would place a call to a Turbo specialist such as Turbo Technics.

Yes' date=' and no.

And for the record, this is both with a simple pipe bolted in place of the cat (ran for at least 2 years+ on my pd100/some time after the conversion) and more recently a single stainless pipe with no exhaust fittings at all.

No problems, plenty of efficient exhaust expulsion.

I'm struggling to work out how the hell a decat can affect anything engine related. I would have thought it would an exhaust (slightly) more free-flowing therefore making it easier (slightly) to get exhaust gases out. (the "blow through a straw, then blow while pinching it" syndrome)

If I had to post one tiny problem with my powerflow decat pipe was that the fitter didn't do up the bolts on the tail end of the pipe all that tight, so one time I looked under the car and evidence of black smoke having blowin out of the join and covering the chassis. A spanner solved this issue.[/quote']

Thanks Jason. So you didn't have boost leak, or a whooshing noise after you decatted? My cat has been replaced by a 3" pipe, and I fail to see how a "loss of back pressure" can occur in a diesel, or indeed create the problems my car has.

Its more likely to be related to the fitting of a new turbo, and intercooler two days prior to the symptoms appearing in my view.

Do you feel like an idiot mate. I am pretty sure that they must think you look like one!!!

So has the new turbo failed?

If I were you I would place a call to a Turbo specialist such as Turbo Technics.

I think they think i am an idiot. I don't know if the turbo has failed as such, but I get the impression after the fault not being found in 5 days, that they are now clutching at straws. Iv'e just paid nearly

whooshing etc is in my opinion not related to the exhaust, unless they've not tightened on the turbo enough to the engine? Obviously the same can be said with the intercooler, if a pipe's not been clipped in right, etc.

If they jerk you around any more (unless you enjoy this... ) take it somewhere independent and who you know, to give it a quick once over (i.e go from air inlet pipe, right through to turbo, exhaust)

Phone Turbo Dynamics, (Not Turbo Technics as I posted above) they'll answer some questions for you and will be familier with the VNT units.

www.turbodynamics.co.uk

Allards as well might be able to help.

I'll phone both. Thanks guys. I'll try Allards first,as they are definately familiar with these units.

Allards say from my problems, it's a boost leak. Simple as that.

Different car i know Shifty but http://www.briskoda.net/forums/general-car-chat/sports-exhaust-restricting-performance/48448/?highlight=MUSSO has similar symptoms, and he solved his problem by inserting a reducer into the exhaust system to increase the back pressure on the turbo as it was 'stalling' a little

The thing is, it ran fine for two days before the problem appeared mid journey.

It's a strange one.

I have just been informed by the service manager that removal of a vac pipe, which stops the turbo working makes the car go better than with it connected. Also the smoke plume is no longer present. Also, behind the turbo, there is an extraordianary amount of soot build up and I quote "suggesting the exhaust is blocked, and the gasses can't get out"

It would suggest to me the seal at the bottom of the turbo has failed, or am i simplifying things here?

Any more idea's please people?

3" decat on a standard turbo is too large better with some back pressure or it just won't spin properly.

I know you've spent a lot but why did you put a standard turbo back in ?

3" decat on a standard turbo is too large better with some back pressure or it just won't spin properly.

I know you've spent a lot but why did you put a standard turbo back in ?

Because there was a 50/50 chance of a warranty claim. Something else they seem to have forgotten.

I was very close to going for a vt7 from Mr Allard. Wish I had now.

Because there was a 50/50 chance of a warranty claim. Something else they seem to have forgotten.

I was very close to going for a vt7 from Mr Allard. Wish I had now.

So sorry to hear about your Fabia Dave hope it all gets sorted and you are back on the road soon. If noone else has the balls to go for a VT7 then I will. (Eventually )

Dave I think you are going to have to go over there yourself and have a look at it.

They will tell you all sorts to apease your enquiries.

I know you've spent a lot but why did you put a standard turbo back in ?

And an FMIC...

I assume you already had problems before this hence the reason you needed to spend £3k in the 1st place :confused:, but if that's the case then why wouldn't they honour the warranty in the 1st instance?

if that's the case then why wouldn't they honour the warranty in the 1st instance?

Probably because there may or may not have been some slight software changes.

Sorry to hear about these problems.

I know I aint taking my car back to that garage in future :thumbdwn:

And an FMIC...

I assume you already had problems before this hence the reason you needed to spend

If it ain't one car it's the other

You are a tuning specialists dream though

PS. Don't forget to send me that

i would think if the smoke stops after a vacuum hose is disconnected that something is being held open by the vacuum , EGR valve or the anti-run on flap next to it , could be that the vacuum unit on top of the o/s shocker is faulty , Shifty are they now telling you that the new turbo is u/s or is it still OK ?

i would think if the smoke stops after a vacuum hose is disconnected that something is being held open by the vacuum , EGR valve or the anti-run on flap next to it , could be that the vacuum unit on top of the o/s shocker is faulty , Shifty are they now telling you that the new turbo is u/s or is it still OK ?

Blimey. Do you do this car thing for a living?

I'll call them and pass that info on cheers

They aren't ruling out turbo failure at this stage