Hesistation on part throttle...

[Mr OCD]

Seems to be just as it comes on boost... if you lift the throttle slightly just as it comes on boost it seems to hesistate ...

No fault codes present

If you put foot down hard it picks up fine

Any ideas gents?

 

[james walker]

what fuel do you use?

 

[xd-data-ii]

Describe "hesitate".

Does it feel like the car kind of pulls back or jerks when coming off boost?

As you just got the car remapped this usually is experienced and is part of the mapping. To do with the throttle duty cycle in the map being altered i think. Apparently some people like it this way. Not so much me but i adapted to it in my car. Got the map altered at one point to have its affect reduced and to be more like standard when backup off the throttle.
Also you are running more boost pressure with the new map which will give it this feeling when coming off boost suddenly

 

[Mr OCD]

what fuel do you use?

V power

 

[Mr OCD]

Describe "hesitate".

Does it feel like the car kind of pulls back or jerks when coming off boost?

As you just got the car remapped this usually is experienced and is part of the mapping. To do with the throttle duty cycle in the map being altered i think. Apparently some people like it this way. Not so much me but i adapted to it in my car. Got the map altered at one point to have its affect reduced and to be more like standard when backup off the throttle.
Also you are running more boost pressure with the new map which will give it this feeling when coming off boost suddenly

Yes... it pulls back / jerks when coming off boost and this was evident before the remapping as well.

If you just rock your foot backwards and forwards over the boost cut in point it seems to hesistate and stumble.

I'm wondering if cleaning the MAF out will help? - Not done this yet... although did the TB last week.

 

[Neil_Ireland]

I had some hesitation on my cupra on part throttle.
I removed the throttle body and gave it a really good clean with carb cleaner and then did a throttle body reset using vag-com.

Car is running perfectly after the clean and reset, no hesitation at all.

Neil.

 

[traumapat]

Seems to be just as it comes on boost... if you lift the throttle slightly just as it comes on boost it seems to hesistate ...

No fault codes present

If you put foot down hard it picks up fine

Any ideas gents?

my leon occasionally seems to hesitate at around 3k rpm. like its hit the power required and stops producing more. it feels like a soft jolt.

its always done this and its more pronouced now the cars running more power.


however reading your description im confused. my problem when the throttle is held at a certain point... for me around 3k. you seem to be saying its when you lift off the power... wouldnt that be natural? turbo starts spinning and producing boost and just when its ready you request less so it dumps the built up boost? thus hesitation... or at least the sensation?

 

[skahigh]

Interesting, I've got similar issues since getting custom code. You expect the car to pull back when you take your foot off the throttle but its more unusually jerky and doesnt make the car feel very smooth to drive. It's a little like if you have changed down a gear and the revs are still to high when you take your foot off the clutch suddenly only not so pronounced.

I also get some hesitation and what feels like fluctuating boost as the car is starting to boost. Once you've got full power on and the revs up it goes like a train.

I have replaced my MAF and logged it at well over 200g/s so I'm sure the MAF is fine, I was thinking it might be n75 and have checked for boost leaks as well. May look at taking my throttle body off and giving it a good clean since I doubt it's ever had one.

 

[xd-data-ii]

Still not sure what you mean by hesitation. Expecially as you are coming off the throttle.

 

[traumapat]

Interesting, I've got similar issues since getting custom code. You expect the car to pull back when you take your foot off the throttle but its more unusually jerky and doesnt make the car feel very smooth to drive. It's a little like if you have changed down a gear and the revs are still to high when you take your foot off the clutch suddenly only not so pronounced.

I also get some hesitation and what feels like fluctuating boost as the car is starting to boost. Once you've got full power on and the revs up it goes like a train.

I have replaced my MAF and logged it at well over 200g/s so I'm sure the MAF is fine, I was thinking it might be n75 and have checked for boost leaks as well. May look at taking my throttle body off and giving it a good clean since I doubt it's ever had one.

how old is the dv? is it sticking?

 

[Cupra_UK]

I have the same thing. When keeping the turbo spooling with reasonably gentle acceleration, if the turbo cuts in and I almost immediately lift off I get this hesitation. Seems to be characteristic of a remap.

 

[skahigh]

how old is the dv? is it sticking?

I wondered that but the valve is just a baby, a 3 week old 007p.

 

[Mr OCD]

I had some hesitation on my cupra on part throttle.
I removed the throttle body and gave it a really good clean with carb cleaner and then did a throttle body reset using vag-com.

Car is running perfectly after the clean and reset, no hesitation at all.

Neil.

Already cleaned the TB... planning on cleaning the MAF out with carb cleaner tonight next then reset ECU.

my leon occasionally seems to hesitate at around 3k rpm. like its hit the power required and stops producing more. it feels like a soft jolt.

its always done this and its more pronouced now the cars running more power.


however reading your description im confused. my problem when the throttle is held at a certain point... for me around 3k. you seem to be saying its when you lift off the power... wouldnt that be natural? turbo starts spinning and producing boost and just when its ready you request less so it dumps the built up boost? thus hesitation... or at least the sensation?

Mine also feels like a soft jolt... and like you say is around 2500-3000rpm... if I lift or accelerate gently round that rpm it jolts lightly... even the Wife felt it last night on way home as I could make it happen on command...

Interesting, I've got similar issues since getting custom code. You expect the car to pull back when you take your foot off the throttle but its more unusually jerky and doesnt make the car feel very smooth to drive. It's a little like if you have changed down a gear and the revs are still to high when you take your foot off the clutch suddenly only not so pronounced.

I also get some hesitation and what feels like fluctuating boost as the car is starting to boost. Once you've got full power on and the revs up it goes like a train.

I have replaced my MAF and logged it at well over 200g/s so I'm sure the MAF is fine, I was thinking it might be n75 and have checked for boost leaks as well. May look at taking my throttle body off and giving it a good clean since I doubt it's ever had one.

What is an N75? / N249? ... I see these codes referenced on here but dont actually know what it is...

how old is the dv? is it sticking?

OE part... funny you mention DV as one code I had when plugged in VAGCOM after bought car was:

17705 - P1297: Pressure drop between turbo and throttle valve (sporadic)

We reset the ECU codes and went for a good drive and it didnt pop up again....

Still not sure what you mean by hesitation. Expecially as you are coming off the throttle.

As above mate

I have the same thing. When keeping the turbo spooling with reasonably gentle acceleration, if the turbo cuts in and I almost immediately lift off I get this hesitation. Seems to be characteristic of a remap.

Thing is it did it before remap as well... hence think something else wrong.

Reading up on this forum shows a possible MAF or N95 fault?

I'm going to clean the MAF out tonight and do a fresh ECU reset and also check / align the throttle body and see what happens...

 

[traumapat]

you may find the standard dv wont last on a remap car... although not saying its that.

i think its a turbo characteristic on these cars. the more power the more noticable it becomes. i think its the boost coming in/out

 

[Mr OCD]

you may find the standard dv wont last on a remap car... although not saying its that.

i think its a turbo characteristic on these cars. the more power the more noticable it becomes. i think its the boost coming in/out

Ok - will clean the maf out anyway as it wont hurt and see how I get on with it ...

Will be plugging in BOSCH tonight again to check for fault codes and if all clear can assume its just a characteristic

 

[Neil_Ireland]

Already cleaned the TB... planning on cleaning the MAF out with carb cleaner tonight next then reset ECU.

Did you reset the throttle body after the clean with vag-com?

 

[andycupra]

both the leons ive had have suffered from this issue. I put it down the the dv finding it hard to make its mind up just as the the driver appears to be on/off the throttle...

 

[traumapat]

Ok - will clean the maf out anyway as it wont hurt and see how I get on with it ...

Will be plugging in BOSCH tonight again to check for fault codes and if all clear can assume its just a characteristic

the issue i mentioned ive explored to a point. ive had 2 mafs , temp sender and 3 dv`s thoughout 4 years... non made a difference.

n75 was studied during the conversion map... all working as it should.

i must admit that since fitting the latest dv which is diaphram as opposed to piston it seems less but its more likely ive got used to it... and your running the stock dv which is also a diaphram so it kinda knackers that idea.

 

[Mr OCD]

Did you reset the throttle body after the clean with vag-com?

Reset throttle body using guide on here without vagcom...

both the leons ive had have suffered from this issue. I put it down the the dv finding it hard to make its mind up just as the the driver appears to be on/off the throttle...

Uprated DV then perhaps?

the issue i mentioned ive explored to a point. ive had 2 mafs , temp sender and 3 dv`s thoughout 4 years... non made a difference.

n75 was studied during the conversion map... all working as it should.

i must admit that since fitting the latest dv which is diaphram as opposed to piston it seems less but its more likely ive got used to it... and your running the stock dv which is also a diaphram so it kinda knackers that idea.

 

[xd-data-ii]

If its new since you got the car mapped then it is something in that. Go back to them and ask them about it.
Doubt its anything else. And it sounds like normal operation for the cars to me