Thanks for the replies,

I remember changing the water temp sensor just over a year ago, I will do that again if it will solve the problem.

If the problem is due to a misfiring cylinder, wont it occur whenever the engine is working, regardless how high the temp is? And how much wold it cost to repair?

As for the codes, can you please explain how to get them. I do not have any code panel next to the battery.

Did anyone experience vibration issues due to a faulty computer/ecu?

All help is appreciated

Thanks.