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2.0tdi running very lumpy

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I've had a 2.0tdi for about 3 months, in which time I've done about 12k. Over the past 2-3k miles, it's developed a fault whereby the car vibrates quite badly - particularly when I'm just on the throttle. I noticed it first when doing a steady 50 in 6th in roadworks, it was almost like a misfire would feel in a petrol engine.

It happens in all gears, and is worst when just maintaining a steady speed, accelerating and decelerating seems not so bad, and coasting gets rid totally. It's not undiveable, just really niggling.

It's in the Dealers at the moment, has been for three days. They've agreed there is a fault, have been onto Skoda Technical sevral times, who have failed to identify the fault after checks, and it has now been passed on to 'the factory' for their input. This would seem to rule out something obvious (DMF?). :thumbdwn:

I'll let you know what they come up with, but just wondered if anyone had any similar experiences? Thanks in advance....

Get them to check the injector quantities (delivered and requested) as I've seen one where an injector was overfueling and above certain RPM the difference was enough to give uneven running.

Could be many things though, including the DMF, so the only real answer is I guess to wait for them to come back to you.

Bet a re-map would sort it. The modern diesel is so emasculated at low 'throttle' settings because of emissions that I'm not entirely surprised.

  • Author

Still no solution after 4 days in the workshop. Manager says they are being given regular items to adjust and check from the tech guys in CZ, and they are feeding back the results. It's a tried and tested engine, so how complicated can it be?

He has intimated that there may be no cure. I won't be impressed if that's the case, the car's only 18 months old - surely they're obliged to correct any faults?

If there is no cure and it's running properly lumpy then I'd say it wasn't fit for purpose ;)

  • Author
Get them to check the injector quantities (delivered and requested) as I've seen one where an injector was overfueling and above certain RPM the difference was enough to give uneven running.

You are spot on mr monkhai - that's the next job they're going to do, after four days..... It'll have to wait until they can give me a courtesy car though - can't keep working from home :thumbdwn:

have you tried injector cleaner and preferbly one that has water repellent in it?

You are spot on mr monkhai - that's the next job they're going to do, after four days..... It'll have to wait until they can give me a courtesy car though - can't keep working from home :thumbdwn:

To be fair to them, it shouldn't take long to do that test at all. Certainly a go for a drive while you wait type thing.

Where are you based as if you really can't make a dealer you can do that check on VAG-COM and there are plenty of us with it who will be willing to help for some beer tokens. :)

have you tried injector cleaner and preferbly one that has water repellent in it?

I certainly wouldn't do that, especially not with the car in warranty.

The water repellent would no doubt be something that deposits itself on the injector, which would be bad. If an injector isn't giving the right quantity, the only real way to fix this is to take the thing out and either replace it, re-nozzle it or sonically clean it.

Fingers crossed they find your problem and get you up and running again.

  • Author

Thanks for the advice. I've got the car back for a few days, as I needed to get some work done :thumbdwn:

It's still as bad as it was, if not worse, so it's booked in for a further three days next week for them to get to the bottom of it. At least I'll have a loan car for that time.

I had a almost identical situation with a VW 1.9 TDI 150 - the dealer and VW unable to sort out so took it to a local diesel specialist. Under 10 mins and he had located air bubbles in fuel line after fuel filter. Took it back to dealer with the report [and bill] and had fuel filter replaced. Improvement was obvious plus smoother tickover and fuel consumption improved by nearly 8 MPG. Hope this helps.

  • 1 month later...
  • Author

As an update, the car had been with the dealer for a total of about 12 days. Mutitude of things done to test, then they fitted new injector seals, then ngearbox removal and new DMF, then new injectors.

I've got it back, and it's a lot better, but still not 100%. Skoda Technical have advised driving it for a while to see if it improves. Happy to do that, there's plenty of warranty left.....

I take it they have done the obvious as suggested above and put a new fuel filter in the thing?

  • Author

TBH I don't know. You would assume they'd covered all bases like that - but you know what assuming does...

I'm just glad to have it back right now, after 2+ weeks driving a 1.2 Fabia. I'll ring re-fuel filter and do it myself if they haven't. Maybe the air filter too.

I think that driving 50 mph in 6th gear is too slow. I have driven in TDi's for more than 10 years and avoid to go below 1600 rpm for reasons of comfort as well as it might cause damage to the transmission.

50 in 6th is just ok on the 2.0 TDI on the flat, I'd try and have the speedo showing 52mph really for 6th.

Still think it's worth changing the fuel filter if they have not as I changed mine at the second service rather than third for exactly that reason.

Air filter obviously if it's never been changed, but they are usually ok for 15-20k miles and even then it just tends to be the MPG dropping off.

My car certainly feels dead under 1200 rpm, I think the torque peak is 1600 rpm for the PD 105 I have. Unless 6th is set very high (Mine lands around 1700 rpm at 50mph but is a 5 speed) 50 mph won't be that low in the rev range. If you floor the accelerator at low revs in a high gear it will make very unhappy noises regardless...

  • 3 months later...
  • Author

So, an update. I got the vehicle back in July after new DMF, injector seals and other bits, still not cured but better, and I agree to drive it for a bit. 10k miles later and the fault is still there, but now it's getting worse.

Take it back to the dealers who will speak to Skoda UK for guidance, and to be fair I'm getting regular updates on progress. Obviously a knotty problem which is taking some solving.

It's a shame, because it's a great car - fast, economical and comfortable. But you know how you tend to 'zone in' on little faults especially when you spend four or five hours a day driving.

Edited by Superbum

That is totally unacceptable from them.Pursue it to the bitter end and i hope you get a result :thumbup:

  • 11 months later...

I've had a 2.0tdi for about 3 months, in which time I've done about 12k. Over the past 2-3k miles, it's developed a fault whereby the car vibrates quite badly - particularly when I'm just on the throttle. I noticed it first when doing a steady 50 in 6th in roadworks, it was almost like a misfire would feel in a petrol engine.

It happens in all gears, and is worst when just maintaining a steady speed, accelerating and decelerating seems not so bad, and coasting gets rid totally. It's not undiveable, just really niggling.

It's in the Dealers at the moment, has been for three days. They've agreed there is a fault, have been onto Skoda Technical sevral times, who have failed to identify the fault after checks, and it has now been passed on to 'the factory' for their input. This would seem to rule out something obvious (DMF?). :thumbdwn:

I'll let you know what they come up with, but just wondered if anyone had any similar experiences? Thanks in advance....

mine is doing this badly........but it comes and goes....some days worse than others but tends to start when on full throttle. It starts to hiccup and then gets worse.

today it sems to be surging on and off quite badly.

It's defo something electonic contolling somthing mechanical. It's always the voo doo electronics that give up first.

Did you get yours sorted in the end?

hi all been a while since i been on, but after selling the 1.8t 220bhp kw variant 3 getting a max of 34mpg. I to have decided to go down the line of a suposedly more economically pd diesel. after initial driving style changes i now get 43mpg is this the norm?Anyway i too have the feeling of drastically labouring the car if the revs drop to around the 1500rpm and then try to accelerate away, again this happens in all gears if the revs drop too low. being a more torquey diesel i didn,t think this would become an issue but clearly it is a problem with the pd engines. are the cars geared to high or is it an engine problem and can it be sorted? should have stuck to petrol engines me,s think.

This problem sounds like the "Stuttering" or "Hiccuping" problem that alot of us 2.0 PD140 and PD170 Owners have got

Somebody has mentioned Overfuelling but we are now going down the route that its the EGR thats causing this and fitting a new smaller gasket might stop this, So im awaiting delivery of this gasket

I should add I have already fitted this gasket to my 2.0 PD 140, as it suffered from the hiccup occasionally, the gasket def helped, didnt cure it completely its still there if you look for it, but much less noticable! An EGR delete could possibly cure it completely, but Id rather not risk losing my anti shudder valve

Im looking at a Full Race EGR but looking at the gasket as temporary fix until i get round to EGR Removal

BTW, I recommend Sere Motors for these, thats where I got mine, if you explain what its for he will know which one you need, very cheap! you can find him on the SeatCupra forums.

Yep i know Dave well spent quite abit of money with him in the past

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