Hi, I am having an idling issue with my 87, with FI of course. When I let off the gas when coming to a stop the idle dives way down, almost to the point of stalling, then comes back up. Sometimes but not often it will stall. The engine seems to run and accelerate well otherwise. It is strange but I have noticed that it will idle appropriately and more consistently when it is first started and driven, (even when at 190 temp) but if I make a stop and get back in and restart it the idle issue will tend to crop up. The idle also seems to be worse after a harder deceleration and stop. I have the fuel injection guide, which I have studied and learned about various aspects of the system, but have admittingly not completely immersed myself into testing everything. I have checked several times for vacuum leaks as it sometimes sounds like there is one but when I check for one nothing stands out. I did some work to engine previously (plugs, distributor, set idle) but not a lot, I was fortunate in that it did run when I first got it. I have spent most of my time on this car welding and welding some more, along with a long list of other mechanicals such as suspension,steering, pedals, exhaust etc. My point being that I will eventually get heavy into the FI and motor but would rather not right now if I don’t have to as it is a (rolling restoration) and I have other aspects of the car I’m focusing on. Do any of you have any thoughts on what could be causing this issue?