Low performance, wrong maf?

[tstrahonja]

i am really not sure..
i started doing logs long time ago when i felt that my car started to be slow..
i do remember that i used to have boost spikes..now there just isnt any..
i did a test today..i wound up actuator as fas as it can go..there is no thread left..car feels much more responsive, boost build up is quicker, but i can just barely get 1.1 or maybe 1.2bar spike when booting in 5th gear...
i checked for boost leaks from turbo to intake manifold..there is no any...i will check for leaks in the intake manifold in a day or two...
i am pretty sure that i should get a big boost spike with actuator wound up as far as it can go?

 

[ibizacupra]

if turbos capable its likely however, your boost requests are'nt asking for much boost as you can see on block 115

 

[tstrahonja]

Yes, but it seems more or less normal for stage 1 to ask 0.9 to 1.1 bar of boost..
And my map asks for 1 bar in low revs and more than 0.9 bar in upper rev range.

 

[ibizacupra]

so if its asking and getting what it wants.... and you confirm this now... Whats the issue?

Its slower now from speed x to y

must have been running more previously surely, or developed a leak now since then...

?

 

[tstrahonja]

Well..on normal actuator setting actual boost doesnt really match requested..
And block 020 seems odd...all zeroes..i would say its because engine is holding back for some reason..
I dont know why, thats why i am asking fo help..
I never changed ECU, never remapped..

 

[ibizacupra]

std boost is 1500mb usually... Yours requests higher. Is yours an Ibiza-R?
020 being zero's on stock is normal..

loads determined from airflow so if dodgy maf then loads will also be off and thats what its controlling by.

 

[tstrahonja]

My Ibiza is not R, just ordinary 1.8t 20v, stage 1.
My requested boost is around 0.9-1 bar( usual for stage 1), and i belive that stock cupra r requests only around 0.7 bar.
MAF should be ok because it is brand new BOSCH one. MAF readings are ok.
I wrote in my last post that i never remapped..i meant that car was remapped to stage 1 when i bought it and i havent remapped it again since...so it is stage 1, only not producing bhp as before...

 

[ibizacupra]

My Ibiza is not R, just ordinary 1.8t 20v, stage 1.
My requested boost is around 0.9-1 bar( usual for stage 1), and i belive that stock cupra r requests only around 0.7 bar.
MAF should be ok because it is brand new BOSCH one. MAF readings are ok.
I wrote in my last post that i never remapped..i meant that car was remapped to stage 1 when i bought it and i havent remapped it again since...so it is stage 1, only not producing bhp as before...

I can only go on what you type dude..

I never changed ECU, never remapped.

So.. non mapped to me is std... which your boost request is'nt...

look for leaks or tired turbo dude.. actuator getting weak? etc etc etc

 

[tstrahonja]

Thanx for helping out.
This is the 1st time i hear about "tired turbo"...i guess it means it performs bad..how can this be if turbo is not broken?

 

[ibizacupra]

they wear like any other component.. Actuators get weak over time also..
and leaks cannot be ignored... Hopefully you have someone you can take it to with a smoke tester to 100% confirm no leaks present.. If thats done, then you have to look to hardware having changed.... they dont last forever

 

[tstrahonja]

Well, good news is that i have a good working k03s ready to be used
However, i wount be using it as an upgrade, ill use it because it is in better condition than my k03...so there will be no remapping for it.
I belive that it should drive fine, maybe being a little bit lean in the upper revs?

 

[ibizacupra]

doubt it.. more airflow more fuel on your ecu..

 

[tstrahonja]

So you think it should drive fine? ECU will be able to adapt to a little bit more airflow in the upper revs?

 

[ibizacupra]

yes.. if in doubt get yourself a wideband afr gauge installed.. take the guess work out of your fueling..
AEM work well and are cheap enough

 

[tstrahonja]

Thank you for all of your advices...i will install k03s in a week or two so we shall see if it is going to fix my power problem...

 

[tstrahonja]

I am still on my old k03, hopefully this week i will install k03s.
So, i did a test run with actuator fully wound in.
Boost delivery is very aggressive, however it will only boost to 1.1, 1.2 bar on peak boost, then drops to 1 bar slowly..in high rpm drops to 0.7..
This way my actual boost is in fact just a little bit higher than requested, as oposed to normal actuator setting when actual boost is a little lower than requested (ass seens in logs above).
I did record a video of speedo and car is equaly fast (slow) with both actuator settings, with both boost levels.
My 0-200 kmh time is worse by almost 7 secs from how it used to be.
Is there a way to test knock sensors? (like measuring resistance or something)

 

[tstrahonja]

And another thing..few months ago i bought new s3 bosch DV.
It makes a farting noise when i gently release throttle, and sometimes when i gently press it..

 

[Tucker157]

I am still on my old k03, hopefully this week i will install k03s.
So, i did a test run with actuator fully wound in.
Boost delivery is very aggressive, however it will only boost to 1.1, 1.2 bar on peak boost, then drops to 1 bar slowly..in high rpm drops to 0.7..
This way my actual boost is in fact just a little bit higher than requested, as oposed to normal actuator setting when actual boost is a little lower than requested (ass seens in logs above).
I did record a video of speedo and car is equaly fast (slow) with both actuator settings, with both boost levels.
My 0-200 kmh time is worse by almost 7 secs from how it used to be.
Is there a way to test knock sensors? (like measuring resistance or something)

If you've wound the actuator tight and its not over boosting like crazy then my vote goes weak actuator..

0 - 200kph is a bad way of measuring performance.. It has lots and lots of variables!! From outside temp and pressure to wind speed and direction, how long your gear changes take... How much fuel and people are in the car, how worn the tyres are... I could keep going!!

Try to find a more standardised way of testing... Like a rolling vagcom log in a single gear... Eliminating grip issues at launch and gear changes!

Sent from my iPad Mini using Tapatalk HD

 

[tstrahonja]

Yeah, i also think that my actuator is weak..
I did measure acceleration in many ways..0-200, 80-180, 80-160 (3rd gear only) and so on..
There is no doubt that my car is slower..
In few days i will put k03s in, remove cat (to make sure that it is not blocked), check once again for boost leaks and hope for the best...
I cant belive that it runs the same as with 1.9 tdi MAF that i used by mistake for few years..
Only thing is that now fuel trims are ok( no safe mode), and boost is a bit more agressive..

 

[tstrahonja]

Well, k03s is mounted and it seems that it is boosting even worse than before..
Ill try to get some logs today..