Engine spluttering at high revs

[high on dirt]

Hello mate did this solve the problem of the stuttering at high revs? As i have the same problem and a fault code to change to the sensor!

 

[Damo]

I'm not too sure as I haven't managed to replace the sensor yet.
I'm waiting for payday before I can replace it.
Sorry, not much use at the minute, although I will update this thread once replaced to say yay or nay.

 

[high on dirt]

Thanks mate i also need to order one VAGTECH will sort it for me as im off away for a week, im hoping its this sensor which is making my boost go mad!

Nick

 

[Damo]

When you say "boost going mad", is that while on the throttle or off it?
If your boost is going haywire while on the throttle then it may be your N75 valve.

 

[high on dirt]

Its only at high revs it bounces then pulls past it if you stay on the power its not the N75 as i have put a few different ones in it now! But VAG.COM comes up with a fault code =

16514 - oxygen (lamdba) sensor B1 S1 Malfunction in circuit P0130 - 35-10 ---- Intermittent.

 

[acidstrato]

well doesnt that make you think that one of the lambda sensors could have gone...? have you cleared the fault to see if it comes back?

 

[high on dirt]

LOL yes i have indeed and yes it does come back, just wondering if it could be anything else. When i first picked up the car it had lots of problems im slowly going through them and sorting abit out at a time.

At current i have a N75 J valve and was wondering if this would also be causing the bouncing. (i no it can cause over boosting)

Thats why i was seeing if DAMO had solved the problem with changing the sensor.

 

[Damo]

I think you definitely need to change the sensor. Mine is the one after the cat but going by the fault code on yours, I believe yours is the sensor before the cat that's gone wrong (someone please correct me if I'm wrong on this as I'm no expert).

I think it may be worth you trying an F type N75 valve. This is what came as standard on mine, although I think some cars came with a C type valve (possibly on earlier cars). Do you know what it came with as standard as changing the valve for a different version can cause problems (not on all cars strangely enough)? I tried an H valve on mine, which was fine for a day then hit limp mode.

 

[high on dirt]

Well the car has a KO3S, front mount etc etc when i picked up the car it had the J fitted but i do have a C and a F ill need to change the sensor then play around with the N75 valve i think.

Thanks for all your help mate

Nick

 

[Damo]

Was the K03S conversion done by the previous owner?
If so, is it possible to speak to him (or even the company that did the mapping)?
Ideally, you should stick with the valve that the car was mapped on.

I'd say start with the sensor. You definitely have a fault there. See how it goes after that. If you still have this boosting issue, start investigating the N75 valve.

 

[Damo]

Ok, I'm starting to get really cheesed off with my car now.....

I've replaced the lambda sensor which has got rid of the fault code.
I've tried a different N75 valve.
A new Maf has been fitted.

Problem I've been having (pg.1) is still present.

I've tried doing some VAGcom logs with Copra from this site.
We could check the fault codes (none), check ABS etc but couldn't get it to communicate with the ecu to do any logging. It's fine with just the ignition on (selecting blocks to log) but as soon as you fire the engine up we keep getting some protocol error message. I don't know anything about VAGcom but Copra said it works fine on his Leon Cupra.

I'm reluctant to keep chucking money at this in hope that it will cure the problem (plugs and coils) especially as I'm getting no fault codes. Surely if these were duff I'd be experiencing other problems???
Can anyone shed any light on the above as to what may be happening (the car or VAGcom)?.
Ideally, before going back to Jabbasport I'd like to explore the options and at least do some logging but I'm running out of patience now (and money).

 

[kieran_cupra]

mine didnt log anything but i had had the same problem. tuRNED OUT TO BE NUMBER 3 COILPACK

Changed all 4 solved the problem

Kieran

 

[acidstrato]

dual login....ooooh m0rk will have a field day! and your one of the originals!!

maybe read some of the most recent threads to do with misfires in the mk3 section and see if the symptoms are similiar to yours.

 

[kieran_cupra]

eh?

Yeah loads of past posts?

Kieran

 

[Damo]

dual login....ooooh m0rk will have a field day! and your one of the originals!!

Ha ha ha I know mate, it's cos I'm **** with computers. I was under the impression you had to if logging on from another pc. I'll get in touch with them to see if they can put it right.

I've done sooooooooo much searching on this and nothing matches up. Most of the problems are load based whereas this is happening while off the gas and in 1 gear.

I think I'll have to bite the bullet and do what Kierans done and replace the coils. Makes sense to do the plugs while I'm at it as well.

 

[kieran_cupra]

yeah i di them both plugs first stil nothing then i did the coils. I replaced 3 then the fualty coil turned out to be the one i hadnt done as i ran out of time to fit it . All sorted now though.


Kieran

 

[acidstrato]

eh?

Yeah loads of past posts?

Kieran

i can count 7 within the space of a month

 

[kieran_cupra]

yeah , well i posted and i was using another so i can beleive it. All problems with cupras tend to hit people at the same time.

When my clutch pedal snapped there was 5 other people in the same week!!

Kieran

 

[acidstrato]

obviously the cold, damp weather since September has been affecting ignition systems. its not really uncommon to hear of. there will are plenty more threads about it to come im sure

as for the clutch pedal, i think that was a coincidence or a mass conspiracy!

 

[acidstrato]

in any case thats what I'd do anyway..plugs first then coilpacks. atleast it rules it out