A Friend brought me his early '90s olds regency with the 3800. It seemed
to have a decent miss at idle which was tracked to the #1 injector. When I
unplugged the injector(engine running) it didn't change the idle. Also, when
going down the road, the car would shutter fairly ...

Just started driving down the highway and a minute in the warning
chime started binging. Binged for about 20 or 30 seconds until I had
almost come to a complete stop.
However the engine warning light didn't go on and my mechanic states