fuel cut at full boost...? why?

[rs200]

again I had fuel cut problem , but now they came even at not WOT.
normal crusing at 2500rpm and fuel cut. there is no fault codes or boost leek. they can easy produce 1bar. I also did boost leek test. and everithing is ok.
what else can cause fuel cut?
tnx
Igor

[rs200]

no ... the lambda probe is 100% OK..and it is not possible, because when lambda is off , car don't work like it have to be..

maf or boost leak, but I'm 95% shure that is boost leak under the intercooler , because the flange is not OEM..

we will find out... thanks guys for help..

[driftin jo]

also try the lambda sensor mate
mine did this
upsetting an m3

It can't be the lambda sensor as it's signal is completely ignored by the ECU at WOT , in fact it's even ignored under moderate acceleration, it is only used for cruising and idle.

[topsparky]

also try the lambda sensor mate
mine did this
upsetting an m3

[newsh]

Yeah, well tidy and white is after all the new black

[Tonks4x4]

It's a bit too White for me but still looks nice clean and tidy :thumbs

[rs200]

hahhah .. yes I forgot...

but people on this forum obvious don't like your engine bay... my fault.. where did I go wrong...?

[benky]

Yes, Igor but you forgot to upload a picture when all was done
This is picture where you can see what it looks now.

[rs200]

thanks ..

tomorow will Benky come to me and we will try to fix that...

this is engine bay of Benkys 200 20v.. what do you say? looking good ?

before:



AFTER:



I'v done whole work, and they use AAN motronic

[Ross]

I had this same problem, read all the threads, figured I'd recently had the MAF plug off and cleaned it, must be a bigger issue... after some head scratching and no confidence in the car I cleaned the MAF connector and it hasn't reoccurred since. Definitely worth a try along with a leak test.

Cheers
Ross

[prj]

Motronic will:
* Progressively retard ignition and cut boost if knock is detected
* Cut boost if you go over max boost specified in boost chip
* Cut fuel if you go over max load specified in fuel chip.

For example, if you have a leak somewhere, a lot more air will go through the MAF than actually into the engine => AFR goes rich => eventually you hit fuel cut, because Motronic wants to protect you from maxing out your injectors.

But of course if MAF contact is bad or MAF reads wrong, then the same issue will happen, because Motronic will think that more air is going into the engine, than there actually is.

[rs200]

yes when done the fuel cut the "CHECK" light come on and after few second shut down... but 100% 2224 error code fuel cut...

so the I thing it is a maf problem, we will check everything , and will find the problem.. I HOPE SO...

thanks guys for a help..

[Audi-Porsche Avant RS2]

Sorry, I have a question, ABY, AAN and ADU Motronic, when there is a problem cut fuel or ignition?

Thanks!

Alessio

[prj]

I agree, check the connector and error codes first.

[driftin jo]

Have you tried cleaning the electrical connector to the MAF ?
I have had boost cut twice and it was only this connector that caused it , it's worth trying this first before spending hours testing for boost leaks only to find there is none .