This sounds like your car is overheating. Driving it while its overheating could cause a catastrophic engine failure and you will have to rebuild/replace your engine. Hollowing out a catalytic converter if it was clogged could hypothetically help in keeping the engine from overheating but it sounds like more than just that.
First with the engine cool, check your radiator to see if its full. Let's go from there.
What size engine do you have?
Monday, July 8th, 2013 AT 5:06 PM