dallasTTQR

Would a bad MAF cause car to only boost to 5 psi

TonyStarkz

Yes, due to hard limp mode.

andrew.tt

a bad MAF could cause this. try unplugging the connector to the MAF and see if your boost returns. it will defualt to a preset fuel map.

do a search un unplugging MAF before you try it.
might be some order of procedure stuff to know.

audiTTyler / RazrTT

Is the only option for replacing a bad MAF going to an Audi dealer?

Vodka G

my car would go into that hard limp of 0.30bar after 20 min of driving

MAF on order and will get it in a few days....hope it'll fix it :-0

ITALSKIER

ECS.COM

TTschwing

There are fueling maps in the ECU...Idle, Partial, and WOT. The MAF and O2 sensors have direct input on the first 2. Fuel maps are built up over time and as long as they're in range, things are good. When they try to correct too far (+20%) for, say, a MAF that's not putting out enough signal, the car will go into protective limp mode so you don't do any damage. It's trying to tell you something....

bubba j

you mean ecstuning.com

Rai

if you are regularly getting thrown into limp mode and don't have vagcom just unplug your MAF for a while to see if thats it

violinguy

My car was going into 5 psi limp after installing my new big SMIC. I was worried it was the IC, but lo and behold, changing the MAF sensor fixed the problem completely.