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Model specific boards => Golf mk5 => Topic started by: Phil mcavity on 23 April 2008, 19:49

Title: Catalytic coverter faulty!!! ed30
Post by: Phil mcavity on 23 April 2008, 19:49
Just had car back from stealers today to have software installed plus look at why the car feels like its gonna stall when i pull up to a stop.in other words its always in drive and the car moves twice as fast as it should using dsg. Fault has been traced to the Catalytic converter???????
 Are there any sensors on that ,that may cus the car to do this????. anyone know or could shed light on why a peice of exhaust system can cause irratic running at idle or in D.

Cars only done 17k and its 1st one has packed up (warranty covered it), does an aftermarket exhaust cus premiture failure of the cat???. Cus it did have a milltech fitted prior to me buying?.
Title: Re: Catalytic coverter faulty!!! ed30
Post by: 182_blue on 23 April 2008, 19:51
Just had car back from stealers today to have software installed plus look at why the car feels like its gonna stall when i pull up to a stop.in other words its always in drive and the car moves twice as fast as it should using dsg. Fault has been traced to the Catalytic converter???????
 Are there any sensors on that ,that may cus the car to do this????. anyone know or could shed light on why a peice of exhaust system can cause irratic running at idle or in D.

Cars only done 17k and its 1st one has packed up (warranty covered it), does an aftermarket exhaust cus premiture failure of the cat???. Cus it did have a milltech fitted prior to me buying?.

did they say what part actually was causing it
Title: Re: Catalytic coverter faulty!!! ed30
Post by: Phil mcavity on 23 April 2008, 19:52
no they didnt , just said theyve ordered a new complete Cat under warranty
Title: Re: Catalytic coverter faulty!!! ed30
Post by: 182_blue on 23 April 2008, 19:53
no they didnt , just said theyve ordered a new complete Cat under warranty

hmm, funny its the CAT, must be blocked or something, perhaps crumbling ?, did you notice any other noises ?, i.e boomy etc ?

good its getting done though as the cat isnt cheap !!!
Title: Re: Catalytic coverter faulty!!! ed30
Post by: Phil mcavity on 23 April 2008, 19:58
whether its been damaged from half the milltech exhaust removed off of it. I know the history of that old exhaust because the same person had it fitted to their standard GTi before the Car caught fire, and moddifed it to fit, ( i read from one of their post ages ago).
are their sensors fitted on the cat which tell the ecu?? or like you say, could be the engine cant breath properly.
Title: Re: Catalytic coverter faulty!!! ed30
Post by: 182_blue on 23 April 2008, 20:00
whether its been damaged from half the milltech exhaust removed off of it. I know the history of that old exhaust because the same person had it fitted to their standard GTi before the Car caught fire, and moddifed it to fit, ( i read from one of their post ages ago).
are their sensors fitted on the cat which tell the ecu?? or like you say, could be the engine cant breath properly.

think theres two sensors either side of the cat ?
Title: Re: Catalytic coverter faulty!!! ed30
Post by: Hurdy on 23 April 2008, 20:16
I thought that your car previously had a full Milltek system fitted?

If this is so, then maybe somewhere the standard one got damaged?
Title: Re: Catalytic coverter faulty!!! ed30
Post by: Rob-MK5 on 23 April 2008, 20:42
There should be lambda ( oxegen sensors) fitting before and after the cat, these measure
the gases going through making sure everything is running as it should be,

Maybe the milltek damaged a sensor?
Title: Re: Catalytic coverter faulty!!! ed30
Post by: Phil mcavity on 23 April 2008, 21:13
well of course i never mentioned to the dealer that the car was previously fitted with an aftermarket system. im not sure it was a full system or just cat back that was on there. all i know is that with the 24k6 software installed, the faults 10 times worse then it 1st was before she went in!!. they seem pretty confidant thats whats wrong and not the DSG box causing it to do what shes doing. im sat in drive, with my foot planted on the brake at the moment, when i let go, she'll do 5-8 mph by itself!!
Title: Re: Catalytic coverter faulty!!! ed30
Post by: 182_blue on 23 April 2008, 21:25
well of course i never mentioned to the dealer that the car was previously fitted with an aftermarket system. im not sure it was a full system or just cat back that was on there. all i know is that with the 24k6 software installed, the faults 10 times worse then it 1st was before she went in!!. they seem pretty confidant thats whats wrong and not the DSG box causing it to do what shes doing. im sat in drive, with my foot planted on the brake at the moment, when i let go, she'll do 5-8 mph by itself!!

i thought they all did that ?, the one i test drove a while back did the same ?, thought thats just what they did LOL
Title: Re: Catalytic coverter faulty!!! ed30
Post by: Phil mcavity on 23 April 2008, 21:27
They should just creep, mine at the moment will hill start and roll foward on a steep incline!!!, all other vw's with dsg have not done this , i know somethings wrong, cus she almost stalls when i come to standstill at a junction.
Title: Re: Catalytic coverter faulty!!! ed30
Post by: TagnuT on 23 April 2008, 21:53
Not right there Phil, hope you get it sorted. Has the Lambda probe been damaged on the change over?
Title: Re: Catalytic coverter faulty!!! ed30
Post by: Phil mcavity on 24 April 2008, 06:59
i think your right tagnut,  one of the sensors is damaged, i know its some kind of sensor fault, because theyve put new software to the cars engine management and its running worse, so to me, thats no an actual blockage of the cat, but a faulty sensor tell the ecu wrong info.
Title: Re: Catalytic coverter faulty!!! ed30
Post by: Cass on 24 April 2008, 08:29
If they are replacing the cat, make sure they either test/retest the lambda sensors or replace them as well. Diagnostics should have shown up a faulty lambda sensor though.

Cass
Title: Re: Catalytic coverter faulty!!! ed30
Post by: topher on 24 April 2008, 09:14
^ as above, if they're replacing the cat they must be pretty confident that the o2 sensor is sending the right signal.
Title: Re: Catalytic coverter faulty!!! ed30
Post by: illyun on 24 April 2008, 13:14
Glad to see you're getting it done under warranty Phil... wouldn't have been a nice introduction to Ed30 ownership if you had a big fat repair bill within days.  By the way, I personally wouldn't advertise the fact that it had Milltek on because you never know if someone from the dealer is reading this.   :rolleyes: :evil:
Title: Re: Catalytic coverter faulty!!! ed30
Post by: neg on 24 April 2008, 17:52
Maybe - I have been in a situation where I had a problem with a previous car, all the insisted on was me returning it to stock to replicate the fault and then they would work on it under warranty ... wierd I know, especially as the problem was not even related to the 'aftermarket' parts.

After all with Milltek ot stock exhaust it shouldnt be doing this anyway.
Title: Re: Catalytic coverter faulty!!! ed30
Post by: Phil mcavity on 24 April 2008, 17:55
So if you get a full turbo back system,say from milltech, does it come with these same senders or do they have to be removed from the Factory fit Cat?
Title: Re: Catalytic coverter faulty!!! ed30
Post by: Hurdy on 24 April 2008, 18:01
Good question!

When they put mine on they didn't do any wiring and so I'd presume that the probes are simply slotted into the Milltek unit.
Title: Re: Catalytic coverter faulty!!! ed30
Post by: topher on 24 April 2008, 19:03
the milltek cats are designed to be compatible with the stock sensors :afro:
Title: Re: Catalytic coverter faulty!!! ed30
Post by: neg on 24 April 2008, 20:29
Thats correct then are removed from the stock unit and fitted into the Milltek.
Title: Re: Catalytic coverter faulty!!! ed30
Post by: jer on 24 April 2008, 20:36
Phil, Just noted that you are having a prolem with Cat and your comments.  Having never owned a DSG car thought this was normal, manual mentioned anti roll back on hills and assumed that this was included in the spec of the car as it was doing this from word go.  I have not had any problem with either the miltek or the lamdaprobe sensors which to clarify a point there is one on each side of the Cat and bolts straight into the miltek system.  If there was a problem with one of the lamdaprobes when you took it to your VW dealer, their VAG computer would have picked it up as a fault! Last comment to make would be the miltek was taken off on the Monday and I drove it until Friday and had no problems, did the stalling that you are now experiencing happen after the updates??
Title: Re: Catalytic coverter faulty!!! ed30
Post by: Phil mcavity on 24 April 2008, 20:49
yes, since theyve done the update that the car needed 24k6, she's not running very well at low speeds, which makes me think that theres a sensor problem. You would know this jer , but sat stationary,in drive, you release the foot brake and shes off, even hill starts she's climbing the hill!!. I know she wasnt doing it on the milltech as much, or i didnt really take too much notice.It wasnt untill i drove both my standard GTi and the ed30 that i wasnt safe to release the foot brake without ramming the car in front!., but above all, shes being fixed f.o.c, and what curious into dealers conclusion was the cat had a fault??. i didnt know whether the old system was a full or cat back system?.
Ive been taken good care of her, she's had 3 waxes and a life shine treatment, and i expect youve seen the pics i posted looking top draw.
I hope your evo's going well, hope your licence stays intact.  :wink:
Title: Re: Catalytic coverter faulty!!! ed30
Post by: neg on 24 April 2008, 20:52
Do you have VAGCOM to check for fault yourself?
Title: Re: Catalytic coverter faulty!!! ed30
Post by: jer on 24 April 2008, 20:54
As said the car has always done it from day one, ie with original standard exhaust, the miltek (which was a full system) didn't go on until Jan 08.
Title: Re: Catalytic coverter faulty!!! ed30
Post by: Phil mcavity on 24 April 2008, 20:59
oks, shes going back in on monday of nxt week and ill report what the dealers come up with!.Theyve done a full check on the rest of the car as i asked them too, and shes totally fine as i know youve looked after her well.
I must ask, i cant get over how fast it goes!!!!. 4000rpm, and it feels like it goes into hyper mode!!  :laugh:, would leave my old GTi's for dust!.
Youve not modded anything else to it jer have you!!,  :smiley:
Title: Re: Catalytic coverter faulty!!! ed30
Post by: jer on 24 April 2008, 21:45
Absolutely no mods.  100% V Power diet!!
Title: Re: Catalytic coverter faulty!!! ed30
Post by: neg on 24 April 2008, 21:55
Phil after having driven all 4 flavours it goes..

1, GTI  :smiley:
2, Remapped GTI on par with a Standard Ed30  :smiley: :smiley:
3, Remapped Ed30   :grin:
Title: Re: Catalytic coverter faulty!!! ed30
Post by: NewGolf on 25 April 2008, 07:24
Phil after having driven all 4 flavours it goes..

1, GTI  :smiley:
2, Remapped GTI on par with a Standard Ed30  :smiley: :smiley:
3, Remapped Ed30   :grin:

Is a remapped GTI just as powerful Torque-wise as ad ED30?  Does the extra 40+ HP make the GTI a bit quicker than the Ed30 as the ED30 is 226BHP and a Bluefin remapped GTI would be 238BHP

I really like my GTI but if the ED30 had full leather at the time I'd have bought one  :wink:

Title: Re: Catalytic coverter faulty!!! ed30
Post by: neg on 25 April 2008, 09:44
The Ed30 is putting out more power it seems than stated in the book - usually around 250bhp which is more or less the same as the GTI remapped.

If anything there might be a slight better pickup on the remapped GTI due to what we thought the smaller turbo and less lag (but it could probably be down to the torque), both myself and another member thought the same when we drove them back to back.

If you look on the results of the latest Awesome GTI RR day you can see the results for your self. 

A remapped GTI is so much better to drive - still very smooth unlike the remapped 1.8T, you notice more with DSG as it you want power when in 6th depending on revs it may drop to 5th or stay in 6th, in stock mode it tends to drop to 4th to get in the power band so in that light it can also be easier to drive.
Title: Re: Catalytic coverter faulty!!! ed30
Post by: NewGolf on 25 April 2008, 10:56
Nice, I have the DSG and seriously thinking about Bluefinning it.
Title: Re: Catalytic coverter faulty!!! ed30
Post by: Phil mcavity on 25 April 2008, 13:06
Edition 30 stock is around 245hp and standard GTi about 215hp, but only when you run them on 99 octane petrol.If you run normal 95 octane, the they both drop to 227 and 197hp.
Title: Re: Catalytic coverter faulty!!! ed30
Post by: NewGolf on 25 April 2008, 15:17
Nice Hp!
We have 2 choices here, 95 (UNL) and 98 (Sup UNL), and I must agree, since filling up with 98 the car feels a lot more responsive. And the miles before next fill up has increased.
Title: Re: Catalytic coverter faulty!!! ed30
Post by: john_o on 25 April 2008, 16:40
as neg says , I found his remapped GTI actually much more progressive than my std ED30
You wouldnt say the ED30 had bad 'lag' as such (which in all honesty it doesnt) , but its only when you jump into a std GTI  you realise it does to some extent.
Shows you how good VW made the GTI , and also how well they dealt with a bigger turbo on the ED30.

std GTI feels N/A in its seamless delivery which is a stunning acheivement
ED30 in the same way has all but no lag.

I purposefully refused remapped ED30 drives at the RR day, as I knew I'd be upset  :grin:

Title: Re: Catalytic coverter faulty!!! ed30
Post by: NewGolf on 25 April 2008, 16:44
Over 300Bhp and front wheel drive must smoke the front tyres through 1st 2nd and 3rd surely? thats a lotta power to put down. even with traction control!

Nice to have more power though. I'll try and see if I can get a good price on insurance then get the GTI chipped at around 5k miles.
Looking forward to feeling the difference, its really meant to be noticable!  :wink:
Title: Re: Catalytic coverter faulty!!! ed30
Post by: Phil mcavity on 25 April 2008, 16:49
nice 2 see thread is keeping on track!  :wink:.
Rolling road section, over the road ,thankyou  :wink:

Im p$issed its so far away, where is it, sheffield area??
Title: Re: Catalytic coverter faulty!!! ed30
Post by: NewGolf on 25 April 2008, 16:53
Sorry for the thread Hijack!  :laugh:
Title: Re: Catalytic coverter faulty!!! ed30
Post by: gazbutmk5gti on 25 April 2008, 19:33
as neg says , I found his remapped GTI actually much more progressive than my std ED30
You wouldnt say the ED30 had bad 'lag' as such (which in all honesty it doesnt) , but its only when you jump into a std GTI  you realise it does to some extent.
Shows you how good VW made the GTI , and also how well they dealt with a bigger turbo on the ED30.

std GTI feels N/A in its seamless delivery which is a stunning acheivement
ED30 in the same way has all but no lag.

I purposefully refused remapped ED30 drives at the RR day, as I knew I'd be upset  :grin:





I can confirm John refused a drive in a remapped ED30, I just thought he was being funny

Title: Re: Catalytic coverter faulty!!! ed30
Post by: Vtec Abuser on 26 April 2008, 01:01
nice 2 see thread is keeping on track!  :wink:.
Rolling road section, over the road ,thankyou  :wink:

Im p$issed its so far away, where is it, sheffield area??
Phil, check my recent thread out http://www.golfgtiforum.co.uk/index.php?topic=84562.0  . I had that exact Milltek (off your car), fitted to mine today and it runs like a dream mate..
Hope yours gets sorted quick anyway..  :wink: