my Lexus rx300 misfired as well and i took it to the mechanic and it was the fuel injectors that where dirty because of bad gas
P0300 is for random engine misfire p0301 and p0305 are misfires on cylinders # 1 and #5 www.lextechautomotivellc.com
Air inside engine
The Lexus LFA has a 4.8L V10 Engine.
You may need a new Random Misfire Solenoid P1300!
The 2013 Lexus IS-350 has a V6 engine.
The 2012 Lexus IS-350 has a V6 engine.
The 2010 Lexus IS-250 has a V6 engine.
The 2011 Lexus IS-350 has a V6 engine.
The 2010 Lexus IS-F has a V8 engine.
The 2009 Lexus IS-F has a V8 engine.
The 2013 Lexus IS-F has a V8 engine.
The 2011 Lexus IS-250 has a V6 engine.