Engine Performance problem
1994 Ford Ranger 4 cyl Four Wheel Drive Manual 176000 miles
Only when I decelerate quickly from a fast rate of speed will the dashboard check engine light come on, and at the same time, I notice the tachometer's standard rpm of 750 Rpm drop to approximately 250 Rpm when at a stopped idle. It is at this time I also notice the engine sound like it is " starving, or struggling" to stay alive, but doesn't die.
When driving and stopping the truck normally, this never happens. I have checked serpentine, cables and their connections to the coil packs, etc.