Dodgy MAF ???

[maRS2]

I would like to know if what hapened to my car come from a Maf going his way.

-My idle is sometime 1500t/mn sometime 900 sometime or pumping from 700 to 1500
- if I drive with very gentle throtle to have no boost my MPG are ok but as soon as I go on boost I get (even only 10 PSI) i get very low MPG

- when I clean the Maf the car is realy smooth and my mpg get better but after 500km it get more and more on/off (mode more laggy) and the MPG drop a lot. Also the exaust tip get more and more black wich is because the car is running very rich.

My car is an RS2 and I have chek:
- the idle valve wich is working good
- No air leek
and have brend new drivter valve and new lambda

Thanks for your ideas about this

[Stick Insect]

I'm not an expert on the turbo charged cars but oil can get in the Inlet manifold and cause problems. I don't know if the MAF has oil laden air passing through. It may be that you need to clean out the engine breather pipes.

HTH

David

[dan_b]

What's the condition of your air filter?

[maRS2]

What's the condition of your air filter?

K&N brand new