Ok, so this is likely problem you are having. You are losing oil pressure at certain rpm's. You have to drop the oil pan and check the oil pickup. You will most likely have debris in the pickup. I recommend cleaning that and maybe replacing the oil pump. The rattling noise you hear is the camshafter tensioner on the back off the engine. This will have to be replaced also. These are both kind of involved jobs and if you don't know what you are doing then I would recommend you not doing it. HTH.
Friday, August 7th, 2009 AT 10:19 PM