should or is it a good idea to eat

Your doctor may need to adjust how much insulin you are taking. Your insulin dose may not be covering what you ate. Let your doctor know what happened as soon as you can so the insulin amount can be changed if necessary

If you are running high, then you need to see your dr and have him adjust how much insulin your pump should be giving you before you add the extra for meals about to be eaten. You may not be calculating your meals correctly as well. Let your dr see your bg log so that he can help you:)

It depends on how high your Blood Glucose (BG) is after 3 hours, and what you tried to do to correct it.

Since you are a type 1, you undoubtedly use insulin. Have you covered what you ate with insulin?