"Model 3 ramp has demonstrated the difficulty of accurately forecasting specific production rates at specific points in time", the company said in an update to shareholders.
Originally, it was planned for the sports vehicle to get into an orbit that will take it out to about the same distance from the sun as Mars' orbit.
Falcon Heavy is the most powerful operational rocket in the world by a factor of two, with the ability to lift into orbit almost 64 metric tons (141,000 lb)-a mass greater than a 737 jetliner loaded with passengers, crew, luggage and fuel.
Mr Musk has had plenty of experience with rocket accidents, from his original Falcon 1 test flights to his follow-up Falcon 9s, one of which exploded on a nearby pad during a 2016 ignition test.
SpaceX's February launch was just a test run for the Falcon Heavy rocket.
Two SpaceX rocket boosters landing together
The rocket, which is the largest in the world in terms of payload, launched from Florida on Tuesday, lifting a red Tesla Roadster into an orbit which will take it into the asteroid belt.
Similar to its smaller cousin, the Falcon 9, this reuse can drastically drive down the costs to launch a payload into space.
More wacky theories have alleged that the mission was part of Musk's plan to take over the world, referencing characters from Star Wars. A Tesla is actually floating through space right now-and it's heading for Mars.
"It gives me confidence that BFR is really quite workable", Musk said. However, it may get impacted with some structural damage from solar radiation, cosmic radiation, and micrometeoroid impacts, as well as the possibility of coming into contact with main belt asteroids as its orbit edges into the asteroid belt.
Falcon Heavy also made history by landing side boosters shortly after liftoff. It was the first private company to put a payload into orbit in 2008, and has since launched satellites and brought unmanned spaceships with cargo to the International Space Station.
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