shaneMazda2000P said:it intersepts the o2 reading and when under boost tells the ecu you are running lean. so it wont pull the fuel.. therefore, it helps keep you running nice and stoiche while under boost.. with out it, the ecu will pull about 30% of your fuel in boost.. .
mspeedP5 said:This must be the stock ECU?
No it just fools the ECU into keeping the air/fuel ratio instead of taking some fuel out.boostequipped said:somekind of electronic boost controller?