Mk7 mid-rev light-throttle judder issue 1500-1700 revs

[DAZZ]

I was wondering whether a remap might make a difference as, if it's a debounce/hysteria issue, it all it might take is a slightly different torque request at a certain point to sort it out.

Well it hasn't cured it totally, but only had a stage 1 map, from 85 to approx 110 bhp, but!! it has really cut down the black smoke when I boot it.....???

[Eoinom]

.... and did Pump and Injector Pilot Relearns and none of the symptoms have come back...

I am interested to know if the injector pilot setting needs a special procedure to do the learning. I meanwhile reset the learned parameters for the injector pilot setting twice. For me, this helped to reduce judder. But what is the best method for learning? I didn't see a learning option in Forscan.
Kind regards,
Ronald

Its under Service Procedures. I'm using v2.3.16 of Forscan.

[Ronald53]

.... and did Pump and Injector Pilot Relearns and none of the symptoms have come back...

I am interested to know if the injector pilot setting needs a special procedure to do the learning. I meanwhile reset the learned parameters for the injector pilot setting twice. For me, this helped to reduce judder. But what is the best method for learning? I didn't see a learning option in Forscan.
Kind regards,
Ronald

Its under Service Procedures. I'm using v2.3.16 of Forscan.

That is where the reset of the pilot injection learned parameters is done. I have been there, done it. I posted the question as I was looking for something similar to this: https://forscan.org/forum/viewtopic.php?p=1353#p1353
Kind regards,
Ronald

[DAZZ]

ahh 2 posts on a similar topic..

[twin--turbo]

Interestingly.... after replacing my 2 dodgyish batteries with to nice big new ones... I have done 20 miles without noticing any part load flutter.

Is it luck?
Is it because the PCM was cleared of drive cycle data??
IS it because battery voltage is now stable???
Is it cured????

God knows, giving it another 70 miles mixed driving before I get hopefull

[Shankie]

Interestingly.... after replacing my 2 dodgyish batteries with to nice big new ones... I have done 20 miles without noticing any part load flutter.

Is it luck?
Is it because the PCM was cleared of drive cycle data??
IS it because battery voltage is now stable???
Is it cured????

God knows, giving it another 70 miles mixed driving before I get hopefull

That's interesting. Do report back!

Sent from my ONEPLUS A5000 using Tapatalk

[Ronald53]

Is it because the PCM was cleared of drive cycle data??

Yep, see viewtopic.php?f=54&t=101335
I did a reset of the learned parameters using Forscan, via the OBDII connector. Had the same effect.
Greetz,
Ronald

[DAZZ]

Is it because the PCM was cleared of drive cycle data??

Yep, see viewtopic.php?f=54&t=101335
I did a reset of the learned parameters using Forscan, via the OBDII connector. Had the same effect.
Greetz,
Ronald

has the judder returned at all?

[Ronald53]

Yes, after a while it did. About a year later. Did a new reset, which again solved the problem.

Grtz,
Ronald

Verstuurd vanaf mijn SM-A320FL met Tapatalk

[DAZZ]

Yes, after a while it did. About a year later. Did a new reset, which again solved the problem.

Grtz,
Ronald

Verstuurd vanaf mijn SM-A320FL met Tapatalk

Well Ive got a single battery van, so think she can have a night disconnected and see

[Steve192]

My 2.2 Euro 5 does the same thing.

How long do you need to keep the battery disconnected for to reset drive cycles?

[twin--turbo]

TBH I would not have expected a modern vehicle to lose the data from a battery disconnect, but I guess anything is worth a try.

I was changing to a Leather wheel at the time which was a ball ache, it was left 20 mins disconnected before I even started. The total down time was probably an hour.

[DAZZ]

tried it.... guess what.... didn't make a difference

disconnected battery, earthed the positive lead as per previous attachment for an hour, had to reset radio etc, so assumed it was long enough.

[Shankie]

I *think* that this might have worked for me. It's not completely sorted, but it seems to have helped.

[DAZZ]

might have found a cure.... looked at a vito sport x at weekend