hi all,
there is a small rubber hose that connects the outlet side of the air pump to metal pipe that i believe leads to the cat, i found this rubber hose to be in a very bad way when i stripped the intake system off my REX this weekend, it was literally in 2 pieces!
my questions are
1) where can i find a replacement? i need to replace is but cannot seem to find the correct hose.
2) would this be having an effect on the running of the car? i stripped the intake because im getting pretty low mpg at the moment and its running pretty rich.
thanks
My understanding is the air pump is used mostly for startup. Once the car CAT heats up the air pump really doesn\'t do much.
The air pump reduces emissions when the engine is below 3800 rpm. Above 3800 rpm the main cat is hot enough without the extra air. The air pump pumps air into the exhaust and into the main cat to give extra oxygen for the pollutants to combine with and burn.
It is possible that disabling the air pump with the main catalytic converter still installed could cause the cat to run so cool that it may get coated by unburned oil from the oil injection pump. No one is sure about this though.