Originally Posted by Comodave
Did this start to happen after the filter change? If so maybe the filter has an air leak. Easy thing to do is change the filter again and be really careful about doing it and see what happens.
No, it started before the filter change.
I had a leak at the heat exchanger, which resulted in overheating of the coolant, which shut down the engine. After I fixed the leak and filled up the coolant, it started to run again, but I had this problem with the start.
Again, once it starts it runs fine.