Originally Posted by swartlkk
2001 SSEi - No pump. Big fat emptyness in that area...
Definitely weird. What would be the side effects of removing it?
im not sure, there is a sensor and a vacuum diaphrom/modulator that go along with it that are mounted on the rear of the egnige, just peaking above the engine cover, so i think i would set a code if it was removed, however, it will also leave a big hole in my crossover pipe for the exhaust.
If noone knows what the purpose of an air injection pump: The pump pushes fresh air into the exhaust to help the catilyst in the catalytic converter work more effectively at removing harmful pollutants.