85 Just Turned Off

[RSTTYPE85]

I had noticed a miss start about 10 days ago but it wasn't that bad so I figured "a spark plug wire". Well, today cruising at about 60 it just turned off. It cranks but won't start and fuel system's ok so... Crank Sensor maybe? Grounds seem ok.

RS

 

[b231v6]

I had a bad thumb wheel chip that shut off on me at highway speed. Position #7 only. Do you have an extra chip you can try?

 

[MeanBuicks]

Very good chance that it's the crank sensor. That's a very typical failure mode you experienced.