Odd engine stutter..?

Eire

Active Member
Sep 19, 2016
26
1
Kildare Ireland
Hi Guys I have a say at Leon ST FR 184 tdi 2014 and sometimes when I'm driving and I take my foot off the accelerator sharply the car seems to stutter or chuck for a split second.. it doesn't happen all the time and I am trying to figure out if it only happens when I am low on fuel.. Just wondering has anybody on the forum had any experiences like this or maybe could explain what this could be...???
 

Dt-spd

Active Member
Sep 1, 2015
246
0
Rugby
I get the same in mine. I dont think the engine calibration is very good to be honest. It isnt something wrong just cal not as good as it should be.

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Dt-spd

Active Member
Sep 1, 2015
246
0
Rugby
Hmm thats hard to believe in this day and age..i wonder have many other owners experienced something similar..?

Seat have to cut cost somewhere and it seems that the quality of the engine calibration is one of them. I imagine they have used a base calibration from another variant that uses the same engine and not spent too much time setting it up for the dynamics of the Leon. There are lots of holes in the calibration that i have spotted, a few below

Torque matching in normal mode vs regen mode is poor.
Regen frequency is high, suggesting a poor combustion system and thrifting of the DPF size
Engine NVH cal is poor, noticeable step change in engine noise at 3500rpm full pedal.
Torque back out behavior when tipping out whilst going downhill

And it's not just my car, I've had a few loaner 184's whilst mine has been in for service/warranty and they all do it.
 

Eire

Active Member
Sep 19, 2016
26
1
Kildare Ireland
Wow thats very impressive information if just a little above my pay grade..:D
Thanks for all the info and you have given me some peace of mind that its not too much to worry about...
 

eoink

Active Member
Jul 8, 2013
21
0
Ireland
Torque matching in normal mode vs regen mode is poor.
Regen frequency is high, suggesting a poor combustion system and thrifting of the DPF size
Engine NVH cal is poor, noticeable step change in engine noise at 3500rpm full pedal.
Torque back out behavior when tipping out whilst going downhill

Can anything be done to reduce these, or calibrate the engine via VCDS or a tuner box?
Or are we stuck with the mismatch?
 

Dt-spd

Active Member
Sep 1, 2015
246
0
Rugby
We are pretty much stuck with it unless Seat release a calibration update, which I think is unlikely as VW have a few of those to do already
 

Slipps

Northern Sassenach
Jan 17, 2015
87
0
Durham
My old 184 did this from new I' m sure ther's an old thread on it somewhere.

Bottom line .... they all do it sir !
 

ps13sr20

Active Member
Aug 28, 2016
14
2
Seat have to cut cost somewhere and it seems that the quality of the engine calibration is one of them. I imagine they have used a base calibration from another variant that uses the same engine and not spent too much time setting it up for the dynamics of the Leon. There are lots of holes in the calibration that i have spotted, a few below

Torque matching in normal mode vs regen mode is poor.
Regen frequency is high, suggesting a poor combustion system and thrifting of the DPF size
Engine NVH cal is poor, noticeable step change in engine noise at 3500rpm full pedal.
Torque back out behavior when tipping out whilst going downhill

And it's not just my car, I've had a few loaner 184's whilst mine has been in for service/warranty and they all do it.

noticed that on mine when i had my 184 as well. Regen frequency was ridiculous.

transition at 3500rpm is driven by a change from single pilot injection to main only injection... 184ps EA288 Diesel VAG engines across the board do this. NVH in cold / part throttle is shocking bad as well.

i put the low pedal input stutter / shuffle down to torque matching or lack there of.
 
Last edited:

Eire

Active Member
Sep 19, 2016
26
1
Kildare Ireland
I wonder is this more noticeable on the 184 Manual Model rather than the DSG version..
Anyone with any thoughts on this..? :confused:
 
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