OK Out of the blue my 86 SDL stalls or shuts off at low speed?? All I did recently was get A/C charged which still needs attention and put in a new kilma which did solve the compressor clutch not engauging

So for no reason when I let off the throttle and slow down the car dies
It doesn't do it all the time but once is too often for me!!
I tried to see if it was while I am turning and braking at the same time
if it happened when I was slowing in a straight line after "dumping" my foot off the throttle
and there is no differance

my filters tank screen lines injectors rebuilt (by me) are all good with not many miles on them

I will say I did notice the same day this "stalling" started that I would leave a light or stop sign on my way out of town

and it (meaning the trans or motor I think trans but..) would hit a flat spot the trans was holding on the gears to long normally I let up on throttle and it shifts and it would still do that but it just seems it needed more throttle

If you have read my other posts you know I have done alot to this car I can usually figure things out but this sounds like something stupid I am not seeing like.......(im thinking)...fuel tank vent plugged!!
It has been having a big rush of air when I take the cap off
Any help is good help
thanks, Noah