I had installed a Voodoo MBC on my GIAC chipped '01 225Q. There is a Hyperboost DV in place. I kept the N75 connector plug in place, plugged the N75 nipplesand swapped the two hoses from the N75 to the MBC as per the directions. I used the coarse and fine adjustments to run at 22 peak.

Problem is, it randomly throws a fit, the traction control/EPC lights come on and the car defaults to some kind of limp mode (engine only idles, no rpm raise). Really sucks when your on the road. When I stop, turn off the ignition, let is sit for a minute or so and then re-start, all seems ok util the next time. Anyone experience this or similar ? If limited to 22 boost I shouldn't be tripping and over boost situation right ?

 

mods not my 4t but I would guess a software problem

 

giac seems to have a problem over certain psi with some cars, see what others are running with gaic chips. you may want to use less course and more fine adjustment on you mbc. the course (ball and spring) isnt helping your cause to much and the fine will limit spiking.