Why is there no pump for secondary air injection?
Also, since there is no pump requiring engine power, parasitic losses associated with the pump are eliminated. However, the aspirator functions only at idle and so admits significantly less air within a significantly narrower range of engine speeds compared to a pump.
What causes the secondary air ignition to fail?
The entire secondary air ignition system can fail due to a malfunctioning combination valve, and the most common reason for this problem to occur is a leaked or blocked line in the system. Does Engine Performance Depend on the Exhaust System?
Why was secondary air injection important in the 1960s?
These systems provided oxygen to oxidize (burn) unburned and partially burned fuel in the exhaust before its ejection from the tailpipe. There was significant unburned and partially burned fuel in the exhaust of 1960s and early 1970s vehicles, and so secondary air injection significantly reduced tailpipe emissions.
What are the symptoms of a bad air injection pump?
One of the early symptoms of a bad secondary air injection pump is the Check Engine warning light turning on. The engine control unit can automatically detect when the secondary air injection pump has a problem.
Also, since there is no pump requiring engine power, parasitic losses associated with the pump are eliminated. However, the aspirator functions only at idle and so admits significantly less air within a significantly narrower range of engine speeds compared to a pump.
What is the code for secondary air injection?
Depending on the car manufacturer, the code’s definition may change. As was mentioned, the secondary air injection system reduces emissions by introducing fresh air into the exhaust system.
One of the early symptoms of a bad secondary air injection pump is the Check Engine warning light turning on. The engine control unit can automatically detect when the secondary air injection pump has a problem.
These systems provided oxygen to oxidize (burn) unburned and partially burned fuel in the exhaust before its ejection from the tailpipe. There was significant unburned and partially burned fuel in the exhaust of 1960s and early 1970s vehicles, and so secondary air injection significantly reduced tailpipe emissions.