Dip in power <2000 rpm

[thaworkd]

my leon 20v/t engine code app
has a odd problem
when i acellerate from below 2000 rpm i feel a dip in my power ,just before my turbo realy starts working


it was much worse before
last week the garage replaced both lambda sensors (original parts)
and my airflow meter (dondt know the english word for it) the part that's stuck right behind ur airfilter


is it normal to feel a dip or do i have a other part thats broken

 

[Willie]

Your air flow meter is called a MAF (Mass Air Flow meter)
It's not normal to feel a dip in power before turbo spooling up.
Does it only do this when started from cold of does it do this all the time?

 

[thaworkd]

he does it all the time
cold i dondt know becouse i drive real slow wen its cold

 

[Willie]

You will need to get the car on the VAG diagnostic system called VAG com to see if there are any fault codes.
This could be a coil pack dying as these give missfires when on there way out.
The coil pack is the modern version of the distributer cap

 

[thaworkd]

no fault codes there
i have vag-com the only fault he has given where my lambda sensor's they are replaced

could it be as it is only when my turbo starts to realy work that it's my n75 valve?

 

[Willie]

If you have VAG com you can monitor the N75 valve to see what is doing.
This would be a good starting place and wouldn't cost anything.

 

[thaworkd]

wich reading block should i select? couse i couldnt find it last time

 

[Willie]

Have you had a look at the Rosstech web site?

 

[thaworkd]

cought me there never took the time to look there
last months where so bussy i just plugged in the cable looked for errors thats it

looked it up block 11 it sais
well off we go for a spin


darn either i have the wrong vag-com or the block is on an other number
ohw well back to the garage it is

 

[LEE69]

You got the full version or the freeware one?

 

[thaworkd]

full version
when i go to block 11 it sais nothing like what i see on the site
there are numbers etc went trough block 1 til 68 but dindt see tha right one

 

[Willie]

Try a quick search on the VAG com section of this forum, there might be more Leon focussed information on there

 

[thaworkd]

thnx will look it up

 

[thaworkd]

during my drive i felt it again looked real good at my rpm,s
its around the 3000 rpm

found one fault now
17972 throttle actuator (j338) under-voltage during basic settings
p1564 - 35-00-

 

[Willie]

Throttle body dying?
You could open this up, clean it with electrical contact cleaner and reseal it then with VAG com do a Throttle body reset to see if that clears your problem.
Other than that check the electrical connections to the TB

 

[thaworkd]

the last problem was simple
my battery was almost empty

looked it up on the rosstech site

 

[thaworkd]

question my dealer sais i need the n75 coded 026906283j
i can get my hands on a 058906283C

are there big differences? or should i buy the one my dealer sais?

 

[thaworkd]

ok the next update
i got a new n75 valve
refitted my original airfilterhousing and filter (k&n)
my normal forge divertervalve

ik seems the worst when i pull up with say 60% throtle then it apears around 3000/3500 rpm

 

[Willie]

Could it be your throttle?
Now this has changed from 2000 to 3000-3500RPM??

 

[thaworkd]

whell i tought it was 2000 so they changed my lambda sensors and my maf
started to take a good look at the when and how

and it occurs in higer gears 3rd and up when i let the rpm drop to say 2000 u feel the turbo spool up
and then in the range of 3000 3500 the car just seems to buckle or stutter but it only happens when i dondt give full throttle say abouth 60/70%