Diesel Fr mk2 hesitant help

[Tam]

Mines started doing it since its last service...

Its out of warranty (over miles) - but will see what they can say - its very very weird .. but exactly the same symptoms as others.

It seems to be regening the DPF (reving at 1,000rpm) much more often too. (like every 100 - 150 miles)

I'm sure its a DPF sensor - thats kinda failed but not quite if that makes sense.

Will try to see if the garage will look at it.

 

[Pheo]

Does the Leon Sport not have a DPF then?

Any idea why not, if so?

 

[Tam]

Does the Leon Sport not have a DPF then?

Any idea why not, if so?

Depends what "sport" you are talking about.

On the Mk2 pre-facelift - only the 2.0 170bhp versions do.


AFAIK - all the "new" face-lifited leons with the 2.0 170bhp also have DPF's as well as the 1.9 105bhp ones - the 2.0 140bhp don't.

No idea why not - it actually means that you probably pay more tax (certainly it if is a company car) getting the 140 rather than if you got the 170 (perhaps thats where it's aimed, cheap tax for company car drivers with lots of power )

 

[Pheo]

140PS MK2 Pre-Facelift Leon Sport

Thanks for your help. Although I may pay a little more tax, I'm quite relieved. They sound like a right ruddy pain!

 

[dannychapman10]

Just to revive this thread for people who still have issues.
As I said, Seat have fitted a new throttle pedal in my car and an ECU update, Friday VW had it for it's 2nd service because it was £120 CHEAPER then Seat as the car is the same as the Golf GT TDI and I picked it up today, just the standard stuff on 2nd service but I asked them to replace the air filter as it was pretty clogged and WOW what a difference! as far as I am aware they didn't do anything other but it pulls so much more, I had torque steer tonight and wheel spin in 3rd gear in the dry my car has never performed like this ever. I don't have any hesitation issues anymore so whether it was the throttle or the ECU update or the air filter, it goes like hell now. Can not wait for the remap at the end of this year

Danny.

 

[/dev/null]

hmmm... Mine was doing it through and beyond its service (air filter changed at service) so I'm not sure it's that. Does the problem seem to have gone?
They've done the latest ECU update on mine too and still does it!

 

[dannychapman10]

Nope, no more hesitation mate. It seems to be cured from something, not sure what though although I have now started to help the DPF out a little, if I notice it come on round town I drive at 30mph in 3rd at just over 2,000rpm and it hasn't been coming on twice as much, I think any hesitation maybe down to the DPF? I really don't know but at the minute, I love my car. Is your car still under warranty?

Danny.

 

[/dev/null]

No, it's a few months out else I'd have just left if with them and said I didn't want it back until sorted!

I originally thought DPF but I do mainly motorway miles, usually 50 mile a day in 25 mile trips plus more sometimes so that should be enough. It also happened about 40 miles into a 50 mile drive the other week!

It's up for its 60k service soon so if depending on what they replace, maybe that will help!

 

[/dev/null]

Still no luck with this - anyone else get any further?? Dealers can't find anything wrong with it, they've had it on the computer, the head mechanic took it home one night but obviously as it's only doing it now and again, it didn't bloody do it!
A few people have said MAF however surely that would throw up a diagnostics error? I'm wondering if it's worth just getting it replaced anyway? How much we looking at and could I easily do it or is it a dealers job?

Thanks

 

[WeeG]

MAF's don't always through up a diagnostic mate, my pal just had his astra CDTI at 61k do the same thing hesitating on partial throttle at low rpm, and wouldn't log a fault code, unplugged the MAF and took out for a few mins drive and it was driving finr again, you should test the car by just unplugging the MAF only for a short time It could be something else but worth a try

 

[Jace]

I had a chavalier that kangarood, turned out to be the maf

 

[/dev/null]

MAF's don't always through up a diagnostic mate, my pal just had his astra CDTI at 61k do the same thing hesitating on partial throttle at low rpm, and wouldn't log a fault code, unplugged the MAF and took out for a few mins drive and it was driving finr again, you should test the car by just unplugging the MAF only for a short time It could be something else but worth a try

I ain't a clue on how to do that lol! Surely unplugging the MAF is bad for the engine though? If unplugging it solves the issue then why have it plugged in at all!?

 

[WeeG]

Your right it isn't good for it that's why dont have it unplugged for long but going for a small drive wont harrm it mate ANd if it is running ok you know it is a new MAF you need

 

[/dev/null]

Ok cheers, How do I go about disconnecting it then?

 

[/dev/null]

Right, worked out how to unplug it - just give it a damn hard yank!

Anyway, the car starts doing the usual crap today so I pull over and disconnect the MAF sensor. Within a second or two the engine starts making a different noise, ie not as juddery and spluttery (new word there! ). Drive off and it feels like a new car! Turbo kicks in where it should, constant pull through the rev range, no blips in power anywhere! I thought it might be coincidence (as it does stop doing it on its own after a while) so I pull over and connect it up again. Within a second the engine is making the original noise and sounding a bit "rough". Drive off and it's the same as before - sluggish, not feeling the turbo pull until about 2.5K revs, dips in power etc etc.
I try the same again (disconnecting, driving and then re-connecting) and lo and behold, it's the same.
So - I think I have nailed it down (at least in my case!!) to the MAF!!

I'll be going in for a service in about 4K miles/ 8 weeks so I'm going to get it replaced then. However, when I originally posted in this thread in September I had it in at the dealers twice at the cost of about £110 and they couldn't find anything up with it, even though they admitted there was a problem - I video'ed the engine making the strange noise and sent it to them as proof!!! Do I ask for a discount on these grounds?? I'm pissed off that I have had to diagnose the problem myself and yet have still shelled out a hundred quid for it!! It was just outside warranty when it started happening. I wonder if it's worth asking SEAT UK to cover some of it - it's not my fault that it took six months to find the issue!!
Or am I pissin in the wind here lol!?

Any idea on the cost of a new MAF inc fitting? I'm reckoning somewhere between £100 and £150??!

 

[robdf2]

what year is your car mate? is it still under warranty?

 

[/dev/null]

No, it's 2006 - warranty expired in June .

 

[Scby555]

was it the MAF?

so from your tests I can see the car will drive with the MAF disconnected? usually the engine just cuts out in the case.

 

[/dev/null]

No it wasn't, I had the MAF replaced and it was just the same! Still not a clue what it is, suspect DPF but not willing to pay the costs to have it replaced and can't really afford removal at the moment. There's a few other threads on here with people having a similar problem and nobody is any the wiser!?

 

[Scby555]

cheers for the reply.

mine's been doing a couple of weeks. I had the DPF and a lambda sensor replaced only last yr or so, and an injector recently as well.

It defo feels clocked up with something or a sensor off.
Mine's a company car so I'll just start replacing bits if need be.

I'll let you lot know what it is when it gets solved.