I am having a rather interesting problem that I can't figure out with my 1996 3.8L v6 with 137k on it.
Occasionally, I will experience a problem when I slow down or stop the car just gives out and shuts off. I can kind of tell that this is going to happen ahead of time because when I step on the gas I will have a bit more power than usual (I'd be going at like 30-35 mph at this point, tap the gas and the car will power forward) then when I go to slow down/stop the RPMs will drop below 1k and give out. This will happen about once a day after the car gets warmed up, it will start again immediately without any trouble or hesitation.
Car has an aftermarket cold air intake, throttle body, plug wires and distributor.
Recently put in a new MAF, new TPS, new IAC, and a new PCV Valve. I did this when I installed the cold air intake and throttle body to clear a too lean code as well as idle issues I was having, it did the trick on that.
My next thought was to try the fuel filter?
Can't really find many other threads that contain an issue like this one, seems like a one off to me.
Does anyone have any insight?
EDIT: Additional Information: I can smell a strong gas/exhaust smell coming into the cabin right before the car is about to stall when I let off the throttle.