Check the EGR crankcase vent, the valve gets old and sticks and the engine can't breathe as well and the air has to go somewhere.  Not sure if the computer will show a code for that.

Clean the contacts on all cap terminals, the corrosiion will affect performance
When was the last tune up

--
Nissan4ME

94 w/ 177K miles.  Manual xmission.  The idle is rough, acceleratio
sluggish.  I took it on the freeway today and it ran fine at speed, as
came off the free way and slowed down (in neutral with minimal braking) i
stalled.  I hit the clutch, turned the ignition and it started right bac
up.  It has also stalled when I've had to make a quick stop, or sometime
when I'm slowing down to turn into a parking space, but it;s alway
inconsistent.  All these times, the xmission has been in neutra

I replaced the fuel filter, but now I'm thinking TPS (haven't checked i
yet).  The cap and rotor (aftermarket) are less than 2 yrs old and I've bee
hearing about problems with a.m. parts.  Visual inspection of the cap show
some buildup on a couple of terminals, but I don't think it's significant

Any ideas as to what can cause rough idling and also shut the engine down a
decel?  1) the fuel controls are being tricked into thinking that they nee
to cut back, and therefore cut off too much fuel at deceleration, or 2
something in the rough idle overcompensates at decel and is unable t
self-correct in a timely manner

Thanks
byramlass@ev1.ne
Being a 94 when was the last tune-up done?
i would look at replacing the

-fuel filte
-plugs & wire
-cap & roter
-clean the throttle body (this could be your problem)

-if that dont cure it get it scanned for fault code
even if your check engine light is not on

--
johnin