The redesigned ute now boasted a new 4.0L V6 with dual variable valve timing with intelligence (VVT-I). This is important because dual VVT-I increases both performance and mpg. Interestingly, there is an exceedingly rare version of the 2010 MY only 4Runner that was powered by a 2.7L I4 engine mated to a four-speed automatic transmission. The dual VVT-i engine is a continuation of the previous engine, which uses VVT-i technology. VVT-i or variable valve timing with intelligence is a machine that relies on changes in valve timing based on engine speed. The narrow or wide opening of the engine valve depends on the engine speed. As a rule, when more revolutions our engine has, more air is needed by cylinders. That's where variable valve timing comes in. Its main function is to modify the phase angles of the distribution diagram, adjusting the camshaft according to the needs of the moment. This VVT system is controlled by the ECU, the electronic control unit that The EGR valve becomes clogged and accelerates the formation of carbon deposits on the cylinders, which leads to an "oil burn", which is approximately 500 ml per 1,000 km. There are problems with a leak in the cooling system pump and a knock in the VVTi couplings during a cold start of the engine. .

dual vvti engine problems