I have an Ingersoll Rand 3445max that was given to me in pieces to rebuild with all new parts following the parts diagram I believe I have it together correctly however it was a lot of air out of the exhaust when you pull the trigger and has very low power any help appreciated

Have you checked the lubrication wick? It may also be necessary to look at the gear set. For this, be sure to contact a service. I think they will do the necessary help with this product. It ' s a good product you should be able to continue using it. However, as I said, the problem may be caused by the lubricating wick.