answer to gtp stall when slowing down !!!!

HEY GUYS IM NEW TO THIS WEBSITE I HAVE BEEN LOOKING FOR SOME ANSWERS TO WHY EVERYONE THAT HAS THESE 60 DEGREE V6'S LIKE TO STALL WHEN YOU SLOW DOWN. I KNOW MANY OF YOU KNOW WHAT IM TALKING ABOUT.... YOUR DRIVING IN A PARKING LOT AT LOW SPEEDS (10-15mph) AND WHEN U LET OF THE GAS AND HIT THE BRAKE BOOM ! THE DAMN IDEL DROPS COMES BACK UP AND THEN DOWN AND THE CAR SHUTS OFF, IT STARTS RIGHT BACK UP NO PROBLEM NO BIG DEAL BUT IT TICKS YOU OFF HUH. WELL I HAD ENOUGH OF THIS BULL SHIT I CALLED UP A LOCAL SHOP IN MY AREA AND I SPOKE TO A GUY NAMES CALIVN THAT WAWS REALLLLY FAMILAR WITH THE 3.4 DOHC(LQ1). HE SAID TO TURN THE IDEL DOWN JUST A HAIR OR INTILL YOU NOTICE IT GO DOWN AND THE IAC BRINGS IT BACK UP TO WHERE IT SHOULD BE, THIS WAY THE COMPUTER HAS ALL CONTROL OF THE IDEL INSTEAD OF THE SCREW BEING SET AT A CERTAIN SPEC. NOW I DONT KNOW IF MAYBE SOME DUMBASS BEFOR ME PLAYED WITH MY IDEL AND THAT IS WHAT WAS WRONG WITH THE CAR,BUT I SURE DO KNOW THAT MY PROBLEM IS FIXED, MY IDEL IS A LITTLE HIGHER AND SMOTHER IN GEAR ITS ABOUT 650-700 IN P/N IT SITS AROUND 710-750

BUT HEY ITS WORTH A TRY BUT MAKE SURE YOU MARK WHERE THAT SCREW IS IT JUST INCASE IT DOESNT SLOVE YOUR PROBLEM AND MAKE THINGS WORSE. O YEAH AND TO DO THIS THE THROTLE BRACKET HAS A SMALL HOLE
THAT IS OFFSET FROM THE IDEL SCREW, SO YOU WILL HAVE TO DRIL IT OUT JUST A TAD BIT TO GET THE TOURQE DOWN IN THERE TO ADJUST IT, AND.

Why are you yelling at me?

My GTP had the same problem. Surging idle and stalling when coming to a stop. I don't know about screwing with the idle screw(ha ha) or why anyone would have done it to your car.

I removed the IAC and cleaned it and replaced it and that cured the problem.

Clean Your Tbi (black Slug Build-up)