RS2 lambda

[alg]

Given the solution to my recent post re poor fuel consumption appeared to be a new lambda probe. Will there always be a fault code associated with a failing probe ?

And as my only problem is poor fuel consumption rather than poor running could there be any other causes ?
Bearing in mind that in the last 18 months it has had new sparks, MAF, N75, air filter and fuel filter

Oh and if it has been running rich due to the lambda does the MAF need cleaning ????

[maRS2]

If your car run rich off boost Lambda ( only cost 50€ from lamdasonden.de)
If rich on boost then it's might be a leak

one other thing that can make the car run rich is to low fuel pressure (don't ask me why it's righten like that in the code fault) had it one time and it was just the clamp on the tube going to the FPR that was not tight, So that when on boost I didn't have enough pressure (so may be knock then ecu retard ignition= high fuel consumption).
can also arrive with fuel pump not working good or FPR out of order.
make your fuelpressure get check

[Doug_RS2]

I would clean the MAF anyway. A duff lambda won't affect the cleanliness of the MAF. If the lambda is just old then it is probably very slow or not doing it's job right at all. I think it gets looked over in services - not sure how often they should be changed but every 40k sounds a good bet. You don't get fault codes for an old lambda.

[RS2.pt]

Given the solution to my recent post re poor fuel consumption appeared to be a new lambda probe. Will there always be a fault code associated with a failing probe ?

And as my only problem is poor fuel consumption rather than poor running could there be any other causes ?
Bearing in mind that in the last 18 months it has had new sparks, MAF, N75, air filter and fuel filter

Oh and if it has been running rich due to the lambda does the MAF need cleaning ????

hi
here is the fuel filter of the RS2? mybe will change mine to (almost 100.000km)... is it dificult?

[RS2.pt]

I would clean the MAF anyway. A duff lambda won't affect the cleanliness of the MAF. If the lambda is just old then it is probably very slow or not doing it's job right at all. I think it gets looked over in services - not sure how often they should be changed but every 40k sounds a good bet. You don't get fault codes for an old lambda.

hello again
how do you clean MAF? I always was told that MAF doesnt need to be cleaned (self clean "burning" the wire), or if we try to clean it, it could be damadge.

[robo]

hello again
how do you clean MAF? I always was told that MAF doesnt need to be cleaned (self clean "burning" the wire), or if we try to clean it, it could be damadge.

http://www.s2forum.com/forum/showthread.php?t=993
_________
Rob

[porkkis]

Longest change interval for different lambda types was 160k km at bosch's spec sheets. There were about 4 different types listed and 160k was the longest recommended renewal interval.
Can't really remember more accurate details about the matter.