Running rough when hot
Do a compression test. Possibly a blown head gasket. I hope not.
Err I hope not too, although I did 40 miles before it does it
You drove it hot for 40 miles???
Sorry my mistake in my wording the car does not overheat or get hot , it just doesn't feel rough when I first turn it on
Well that's good news! Do you have a CEL light on the dashboard?
I shall get the computer on it today
Good. That way you can get the answer.
Possibly a bad coil pack malfuctioning when the car hit normal operating temp or MAF sensor. The CEL code should reveal the exact problem.
I am thinking maf sensor
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