pirelli misfire issue

[Top Cat]

i have heard APR tuning map to suit pirelli to so that misfire has disappear . still waitin for the GIAC.

using caltex 98. i am not from UK.

for revo stage 1, no hardware needed
stage2 TBE + intake
stage2+ HPFP

is the above correct?

Near enough for the Revo stages, only thing is the intake is not required for stage 2 but is advised on stage 3, for full benefit. 

[wigit]

noszex i'll scan the dyno plot form ours later today which shows the profile after 5,500rpm 

[noszex]

so does anyone on giac and have solve this issue?

[vRStu]

There is a mechanical reason why the Misfire occurs and as correctly mentioned above, REVO have a modified map available to owners with a Misfire issue.

[john_o]

are you able to eloborate on that stu?

[vRStu]

Sort of John.

There is a TSB out in the dealer network which details an issue with incorrect valve springs.  Trouble is it'll be difficult to prove an issue without having performance software installed.

[john_o]

thanks , I ask as I wanted to update the Edition 30 FAQ on here , as I have stated remaps crossover to Pirelli variants easily lol!
is this the same issue that is sorted by adding downpipes to later Edition 30/S3 cars ?

in terms of valve springs how do REVO workaround a physical issue with software?
Ive only ever know of valve bounce with incorrect springs, does it just cause a brief harmonic which effects the valve opening = weak mixture = misfire??
just interested to learn
cheers
John

[wigit]

Sort of John.

There is a TSB out in the dealer network which details an issue with incorrect valve springs.  Trouble is it'll be difficult to prove an issue without having performance software installed.

useful information when it goes in for its first service 

i'm sure Revo aren't going to give away there secrets, this is the dyno plot from mine which shows the power drop off after 5,500 when they revised the map.

[john_o]

is that DSG wigit?

[wigit]

manual

[noszex]

giac dealer from aus is saying that its the Valve spring issue.

anyone can confirm on this that VW has actually not put the correct ones.

[john_o]

Im trying to find a bit more info on this for the FAQ

so far I have some more info from the greek forums!

"painted yellow / white are soft springs causing the issue
Painted blue / yellow springs correct.
These springs are all equally responsible for S3, TFSI 200cv Leon, Leon Cupra, Golf MK5 GTI, etc."

"TSB 2019062/1 Symptoms are misfiring between 6000-6500 RPM's under heavy load accompanied by power surging."

and this very interesting post :

theory about why the valve spring issue occurs

also note there appears to be a factor of correlation also with camshaft duration and exhaust flow.

best I can do for now 

[noszex]

so do we wait for vw or we can sent to change it. and where can we get the right valve spring.

[john_o]

from what i know just now :

you either need to change the springs at your own cost  (because using a normal map the issue isnt apparent, so VW arent going to be interested)
OR
use a remap that acknowledges and works around the issue.

first issue would be to DEFINITELY confirm any misfire is due to this factor......

[paolo]

BUMP!
hey guys new owner with a Pirelli suffering from this misfire. I am currently running the GIAC extreme flash with supporting mods:
- 3inch 200cel custom downpipe
- Arqray catback
- Autotech fuel pump
- VF k04 intake
- RS4 fuel rail pressure valve
- BSH intercooler
- wayne angle block
- GIAC extreme flash
- BFI TAI
So i get this issue at full throttle and at or close to redline and its always the same code: misfire in cylinder 3. I am pretty sure it is the valve springs since i have replaced my downpipe and have the wayne angle block already which should take that CEL away. Just wondering how long/difficult is a job to replace these springs?
thanks!