Musk Still in Production Hell as Gigafactory Delays Model 3

Photographer: Troy Harvey/Bloomberg.

By Dana Hull

Tesla Inc. still hasn’t figured out how to overcome manufacturing challenges that threaten its viability, with battery factory-line glitches delaying production of its cheapest car.

The electric-car maker won’t build 5,000 units per week of its Model 3 sedan until sometime in March, three months later than planned. “I have…