Best diesel engine

[chessie4905]

It was actually beneicial at the time. But I removed the system from my car and plugged the holes left in the exhaust manifold.


https://en.m.wikipedia.org/wiki/Secondary_air_injection

[TomC]

Geoff-How'ya Doin? The purpose of the air pump pumping air to each cylinder at the exhaust manifold is to introduce extra clean air that will actually burn excess hydrocarbons off in the manifold. That's why sometimes you get a gurggling sound coming off the exhaust-it's the raw gases igniting in the exhaust pipe. Good Luck, TomC