I had a root canal 6 yrs ago and had it redone 2 rrs ago . i now have throbbing and a weird "feeling" in my tooth and it travles to my jaw and ear.

Evaluation needed: You need to see a dentist in order to determine the cause of your pain and what treatment options are available to you. There are many possibilities and without actually being able to examine you and see x-rays of the area, any answer would only be speculative. Failed rct? Abscess? Fractured root? Periodontal abscess? An adjacent tooth, etc.

Get it checked again: You could have a problem with that same tooth or it could be another tooth acting up on you. Root canals are highly successful but when they are retreated the success rate drops a bit so i wouldn't be too surprised if that is the case.

See a dentist: Have the tooth looked at again by a dentist. If the tooth is failing, then a dental implant may be a good option to look into. Good luck.

Microscopic Endo: Get an evaluation from a microscopically trained endodontist. If they feel it is hopeless, then you can be confident all avenues have been explored!

Redo of root canal: Mayday, it sounds like an x-ray is in order to determine if there is an abscess in your jaw.

Possible failure : Root canal therapy is not foolproof. Though good, +/-95% success rates at 15 years, treatment can fail ~5% of the time. Yours sounds like you've developed an inflammatory reaction. The cause can be infection, fracture of the root(s) or unknown. Have your tooth checked by your dentist asap.