Q: Engine shut off cannot be started - 1999 Isuzu Amigo

I had several repairs done on my car, which included the water pump and timing belt replacement and head change. All the replaced parts were new. The engine ran great after that. However, a few weeks later, I was driving the car when the engine shut off all of a sudden. I attempted to restart it but it wouldn't start back up so I had it towed home. Now, I cannot start the car. There is occasionally a sound as if the cylinders would fire. But, there is no cranking. I had the codes read and the 1167 error code appeared. The fuel gauge is also fluctuating a lot. What should I do?