Car starts just fine then starts missing?

Hello,

A timing belt synchronizes the rotation of the crankshaft and the camshaft(s). This makes the engine valves open and close at the proper time during the engine operation.
So if the timing is off by a little it can severely affect the engine.
The timing mark should be at TDC this vehicle.
So you will have to adjust it and make it at TDC.

You might find this article helpful:

https://www.2carpros.com/articles/how-a-timing-belt-works

I have attached replacement procedure for your reference.

Please let me know of any questions.

Thank you.