Hesistation on part throttle...

[xd-data-ii]

Give it a week of so to see if the flat spot grows to like before - before getting mapping altered
Resetting the ECU will make it feel real different but as the adaptations settle in you would notice it possibly going back to normal.

Did you reset the ECU recently before you installed the new map? Did you see the same result?

 

[Mr OCD]

Nope didnt reset ECU before installed new map as had only had the car two days ...

I'll give it a week or so to see what its like ... although will be using it alot this weekend so wont need that long really to adapt - my cousin (tuner) says about 200 miles should do it.

 

[xd-data-ii]

And drive it like a mad man til then too!!

 

[Mr OCD]

And drive it like a mad man til then too!!

Does that make any real difference?

I dont hang about but I dont hammer the car either...

 

[xd-data-ii]

I found it does and so do others say.
Resetting the ECU resets all the adaptation the ECU has learned about your driving style.
If you drive slowly and in a manner to preserve fuel for example it will adjust to give priority to this style of driving etc. If you gun it for a while right after the reset it will see you demanding more power and performance and adjust to give this as its default.
Dont think its a huge difference but i think it is noticable on how it adapts.

 

[LEE69]

Surely if it a "learning ecu" and you don't maintain the "increased right foot" it will learn new settings?

 

[munkimafia]

UPDATE:

MAF installed... air filter replaced... ECU reset...

Massive improvement from before but still a tiny flat spot around 3krpm but its barely noticable ... traumapat was right ...

I have spoken to my mapping guy and he reckons might be able to map the flat spot out ...

How much was the air filter? Did you get it from GSF as well, and is it easy to replace? Im planning on doing mine this afternoon!

 

[xd-data-ii]

Surely if it a "learning ecu" and you don't maintain the "increased right foot" it will learn new settings?

Initial adaptation is over the first couple of hundred miles after reset. What you do after is not really accounted for.

 

[Mr OCD]

How much was the air filter? Did you get it from GSF as well, and is it easy to replace? Im planning on doing mine this afternoon!

About a tenner... let us know how you get on...

Initial adaptation is over the first couple of hundred miles after reset. What you do after is not really accounted for.

Ok... well car gets used briskly anyway but will ensure I use it a little harder than normal

 

[munkimafia]

Just changed the MAF, didnt other with the air filter.
Interestingly, when i took off the old MAF, there was only one screw holding it in place, so someone has either tried cleaning it and not put it back properly. Going to get a new screw tomorrow when i take the MAF back for my surcharge refund.
How do you get the ring back on over the air filter side? Its an absolute bugger!
Car seems a lot smoother now, so very happy so far. Will see what the run to work is like tomorrow and let you know!
Cheers for all the advice and help

 

[Mr OCD]

Just changed the MAF, didnt other with the air filter.
Interestingly, when i took off the old MAF, there was only one screw holding it in place, so someone has either tried cleaning it and not put it back properly. Going to get a new screw tomorrow when i take the MAF back for my surcharge refund.
How do you get the ring back on over the air filter side? Its an absolute bugger!
Car seems a lot smoother now, so very happy so far. Will see what the run to work is like tomorrow and let you know!
Cheers for all the advice and help

Ring?

 

[munkimafia]

Ring?

I think it was an alternative to a jubilee clip, sort of a ring that is very stiff that fits over the MAF to clamp it. I took it off otherwise the MAF wasnt going on, so have bought a new jubilee clip and put that on instead!
Car ran nice into work this morning, alot smoother through 2nd.

 

[Number86]

I get the same jolt after gentle acceleration and lift off.

It's never got any more pronounced or frequent though, so haven't really worried about it.

Oh, and it's remapped.

 

[Mr OCD]

I get the same jolt after gentle acceleration and lift off.

It's never got any more pronounced or frequent though, so haven't really worried about it.

Oh, and it's remapped.

Thats the jolt my new MAF has sorted...

Done over 100 miles since and its all nice and smooth with the smallest of hesistations about 2.5-3krpm... its defo the turbo circuit the culprit as when I rev the car gently in 2nd gear slow without using turbo no hesistation is evident at all ...

 

[Mr OCD]

UPDATE:

This small hesistation /flat spot at 2.5k-3krpm is starting to nark me now ... spoke to my mate who does performance cars and he recommends replacing the boost valve next...

Where can I get a new boost valve from?

Car is going on rolling road next Friday to see if issue with fuelling ...

 

[traumapat]

UPDATE:

This small hesistation /flat spot at 2.5k-3krpm is starting to nark me now ... spoke to my mate who does performance cars and he recommends replacing the boost valve next...

Where can I get a new boost valve from?

Car is going on rolling road next Friday to see if issue with fuelling ...

boost valve as in dump valve?

 

[Mr OCD]

boost valve as in dump valve?

No... as in boost controller valve ... N95?

Not sure would be dump valve as likely would be higher rpm... do these cars have an actuator?

 

[traumapat]

No... as in boost controller valve ... N95?

Not sure would be dump valve as likely would be higher rpm... do these cars have an actuator?

maybe n75 then. i think they have an actuator but its a guess.


loads will come up on a search for n75 valve.

i suggested this to jabba after i went big turbo as the flat spot was more pronounced but the n75 was logged throughout mapping and totally behaved itself.

i think your waiting expectedly for it to happen so its annoying you. i dont even notice it now.

be careful how much money you spend on this problem.. i think its a quirk along the lines of what andy said. its just a 1.8 engine when turbos not in use so when the ecu pulls it out the system theres a noticable difference. i think it dosnt happen on more than part throttle as theres enough turbo spin to bleed the power out smoothly.

that is a total guess though purely thought up to stop me laying awake at night pondering jolty flat spots

 

[Mr OCD]

maybe n75 then. i think they have an actuator but its a guess.


loads will come up on a search for n75 valve.

i suggested this to jabba after i went big turbo as the flat spot was more pronounced but the n75 was logged throughout mapping and totally behaved itself.

i think your waiting expectedly for it to happen so its annoying you. i dont even notice it now.

be careful how much money you spend on this problem.. i think its a quirk along the lines of what andy said. its just a 1.8 engine when turbos not in use so when the ecu pulls it out the system theres a noticable difference. i think it dosnt happen on more than part throttle as theres enough turbo spin to bleed the power out smoothly.

that is a total guess though purely thought up to stop me laying awake at night pondering jolty flat spots

Trouble is its bugging the hell out of me now ... the car has settled down as done around 300 miles since the remap / new MAF and noticed a couple more things ... not sure if problems as such:

- Revs seem to hang when shifting at high rpm
- Accelerate from 2500rpm and you hit the hesistation at 2700-3000rpm then it feels a little flat until about 3500-3800rpm before the turbo comes in hard and pulls its round towards redline...

I seriously think there is an issue with the turbo system... it really does feel as though the turbo is not coming in at full boost till 4000rpm...

I could really do with someone local taking me out for a drive in their Leon Cupra (standard or basic remap) for a comparison ... possibly swapping over the N75 for a try ...

Connecting a boost guage up temporarily might show if anything is up? - where does the feed connect on these cars?

I've been offered a rolling road run on Friday so that might also highlight some problems?

 

[xd-data-ii]

Yep, turbo should be in around 2500rpm not 4000rpm