Hello, I have a 2004 IS200, manual transmission, with lpg, and 147,000 kilometers, I did remove the first catalyst because broken, I did redo bands and valves, due to breaking the wing and now the engine is running irregularly at least, seems to go out andthen he resumed, accelerating tears, while above 3000 rpm and 'perfect, what can' be? NGK spark plugs are new, distribution and 'was made.
The problem 'more obvious hot and high outside temperatures.
Thanks and sorry for my bad English!