Chevrolet Repair: 93 chevy astro dies when slowing down, vacum leaks, chevy astro

Question
HI FOR THREE WEEKS NOW,, I HAVE WORKING ON MY DAD VAN, GOING NUTS, STARTS FINE DRIVE DOWN THE ROAD AND LET UP ON THE GAS LIKE TO TURN IT JUST DIES, WILL NOT RESTART UNLESS I SPRAY ETHER TO IT THEN RUNS FINE AND WILL RESTART ON ITS OWN UNTIL YOU GO DOWN THE ROAD AGAIN,HAVE REPLACED FUEL PUMP,,FILTER,EGR RAN FUEL PRESURE GAUGE STAYS AT 12LB ,MAP SENSOR BOTH TEMP SENSORS OIL PRESURE SWICTH,FUEL RELAY IAC VALVE SWAPED THROTTLE SENSOR AND COMPUTER AND NEW OXYGEN SENSOR THAT WAS THE ONLY CODE I EVER GOT UP,MOTOR DONT MISS NO VACUM LEAKS TESTED DISTRIBUR PARTS, WHEN IT DIES YOU CAN WATCH THE INJECTORS JUST STOP WORKING LIKE I TURNED KEY OFF.ON THE 4.3 TBI THEY SAY THE REGULATOR BLEEDS OFF ON ITS OWN, BUT IS IT SUPPOSE TO BLEED OFF QUICK OR SLOW,PEOPLE SAY IT COULD BE IT BUT RUNNING OUT OF MONEY ALONG TIME AGO, WHEN IT FIRST STARTED DIEING IF I JUST BARELY KEPT MY FOOT ON THE GAS IT WOULD STAYING RUNNING,BUT AT IDLE IF I LET IT DIE I DONT GET ANY INJECT SPRAY WHAT ELSE CONTROLS THAT HOPE YOU CAN HELP THANKS JEFF   PS I FORGOT TO TELL YOU AFTER EVERYTHING I REPACED IT WILL NOW RUN SITTING STILL MOST OF THE TIME AND SOUNDS GOOD UNTIL I GO DOWN THE ROAD,I CAN SIT WITH MY FOOT ON BRAKE AND PUT IT ON A LOAD IT WONT DIE UNTILLI DRIVE IT IT JUST DONT MAKE SENSE THANKS AGAIN

Answer
HI Jeff, After all that you have done, the next thing I would do is replace the dist with a reman dist!! I think that the mainshaft magnet on the you have is weak and not sending a good signal the ECM. The dist is what sends the signal to the ECM to make the injectors spray. That is all I can think of on this problem.

Let me know what happens

Have a Great Holiday

Mark