Had to clean the throttle body on my 180k mile mazda mpv once.Not trying to start a war, but unless you have n2o/fuel injected before the TB fuel does not get anywhere near the TB, so what is your point.
Looks to me like your air filter is doing a good job.
Nothing to do with the air filter. PCV vapors swirl around and cake on the back and sides of the TB as well as form a puddle of oil in the intake manifold. GM with their direct injection engines actually stress the use of top tier gas and their own oil specification. They believe it will cut down on deposits on valves and intakes. My opinion is that on a port injection engine a catch can is not required if you use top tier gas, fuel system cleaner and clean the TB every once in a while. On a DI engine, if I ever get one again, I will definitely have a catch can. Stupid fast buildup of carbon on valves with DI engines.Not trying to start a war, but unless you have n2o/fuel injected before the TB fuel does not get anywhere near the TB, so what is your point.
Looks to me like your air filter is doing a good job.
While what you said about about the PVC vapor is correct, (unless you don't route them into the intake) how does fuel quality affect that?Nothing to do with the air filter. PCV vapors swirl around and cake on the back and sides of the TB as well as form a puddle of oil in the intake manifold. GM with their direct injection engines actually stress the use of top tier gas and their own oil specification. They believe it will cut down on deposits on valves and intakes. My opinion is that on a port injection engine a catch can is not required if you use top tier gas, fuel system cleaner and clean the TB every once in a while. On a DI engine, if I ever get one again, I will definitely have a catch can. Stupid fast buildup of carbon on valves with DI engines.