Please help me find the TSB for my issue

Feb 9, 2009
I have a 2006 Lexus GS300 (V6-3. 0L engine (3GR-FSE)). I took my car to the dealership because the check engine and check vehicle stability control indicators were on. I was told at that time that there is a TSB to replace valve springs in my car. There were two missfire codes that were found on analysis, which are P0305 and P0306. The car was also in due to needing to have some parts replaced due to a recall, and one of the recalls was the fuel delivery pipe. So, I would greatly appreciate it if you could get me the TSB to replace the valve springs. Also, I was wondering if you know if the need for the valve springs being replaced would have anything to do with the fuel delivery pipe leaking? Thank you for all of your assistance with this matter! I look forward to hearing from you soon. . . .