Ok guys i just got my car back after a HG rebuild. Work done was 2mm titan hg with arp's 550cc injectors and lexus afm. Safcii wired in and the apexi boost controler. All the vac lines have been replaced with new and cable tied on. I have a problem with the car stalling when i let of the throttle. It never did this before. Just seem to lose too much rpm. any ideas guys. Could it be the boost controler needs some adjustments?