Engine shuts off after driving one to two hours

Hi,

Have you checked to make sure the battery terminals are clean and tight? Also, check to make sure grounds to the engine block and body are clean and tight. What you described does sound like a connection issue.

I do have another question. When you say the gauges start fluctuating, is it a result of the engine failing or does it seem more like an electrical issue? I ask because it isn't uncommon for a crankshaft position sensor, when going bad, to fail when they get hot. After a cool down period, they work again.

Take a look through these two links. One describes what the sensor does and the second describes symptoms. Let me know if your vehicle mirrors what is being described.

https://www.2carpros.com/articles/how-a-crank-shaft-angle-sensor-works

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

Let me know.
Joe