I've got a 1990 Chevrolet Lumina Euro 3.1 that runs and drives well in every
way except one--sometimes at idle or when coming to a stop, it will simply
die. It always starts right back up again like nothing happened, and has
never turned on the Service Engine Soon light.
At times I get a warning in the way the tachometer behaves. The needle will
"flutter" below 1000 RPM. It doesn't always stall when it does this, but
it's a pretty good indication of whether it will or not.