MULTIPLE RWY OP PARALLEL APCHS IN PROGRESS. ACR X HAD LTSS FROM ACR Y. SYS ERROR.

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ACR X ON A VECTOR TO THE ILS 3L AT DTW; ASSIGNED ALT 4000 FT AND A HDG OF 120 DEG. CTLR ISSUED A TURN TO 150 TO ACHIEVE SPACING VERY SHORTLY ABOUT THE TIME WE ROLLED OUT ON THE HDG 150; WE WERE GIVEN A TURN TO THE L OF 030 AND THE CTLR SAID SOMETHING VERY QUICKLY ABOUT TURNING US BACK OUT TO THE DOWNWIND AGAIN; THEN HE BECAME VERY OVERLOADED WHEN HE DISCOVERED THE TFC TO RWY 3R AT DTW WAS CONFLICTING WITH US. HE THEN TOLD US TO QUICKLY CLB TO 5000 FT BECAUSE OF ACR Y IN OUR TURN TO THE NEW HDG. I QUICKLY CLBED TO 5000 AND TIGHTENED UP OUR TURN. I ALSO GLANCED QUICKLY AT MY TCASII DISPLAY AND SAW THE TFC ON OUR DISPLAY JUST 200 FT BELOW US AND INSIDE THE 2 MI RING. AFTER LEVELING OFF; THE CTLR RECOMPOSED HIMSELF AND THANKED US FOR DOING A GOOD JOB. MY FO COMMENTED TO ME THAT THE CLB WAS VERY FAST AND SAID HE WOULD HAVE NEVER MANAGED THE LEVEL OFF AT 5000 FT HAD IT BEEN HIM. MY FEELING IN GENERAL; WAS THE CTLR LOST THE SEPARATION DURING A BUSY PERIOD OF SIMULTANEOUS ILS APCHS AND ASKED FOR OUR HELP BY TELLING US EXACTLY WHAT HE NEEDED WITHOUT WASTING TIME. I COMMEND THE CTLRS FOR TELLING US WHAT HE HAD TO HAVE IMMEDIATELY TO RESOLVE THE CONFLICT.