Sounds like an electrical problem - maybe coil
It shuts down the voltage to the primary coil on the distributor, power to fuel injectors, and fuel pump also.
Plugs, coil, injectors, etcsee related question below.Plugs, coil, injectors, etcsee related question below.
I would start with the Pickup Coil and the Crank Sensor.
Spark plug wires porous? Defective distributor cap? Defective ignition coil?
First guess would be the pick up coil in the distributor
most likely the coil housing is cracked or distributor cap
This is by design, as the engine is not under load. the engine computer shuts off the fuel injectors, there is no hysteresis so the injectors turn back on quickly once below 4000rpm, and the cycle repeats. This also happens when the speedometer maxes out, in my case, 180kM/h, the fuel injectors shut off.
There isn't a way to disable the governor. The computer takes input from the engine speed and vehicle speed, when it reaches a certain point (actually about 97MPH) the computer shuts off the fuel injectors and ignition at the coil util the speed drops back down.
Loose or corroded battery cables? Bad coil?
Moisture related problems occur in the ignition system. The distributor as well as the internal iginition coil need to be tested.
change your opti-spark they are know for this