Hello,
I have a bit of a problem with the secondary air pump not switching off when the ignition is turned off and then running the battery flat. At first I could hear something running and thought it was the fan but having had a look it is definitely the secondary air pump. It has on occasion gone off and on once the ignition is off.
My understanding is that the secondary air system helps heat up the catalytic converter on a cold start, but I have seen elsewhere that some people remove this completely, so I wonder what its value is ultimately?
But this raises a few questions:
a) what could be causing the pump to run on after the ignition is off? Especially what might cause it to go off and on intermittently? (a sensor?)
b) once the catalytic converter is at working temperature shouldn't the pump switch off? Does it run continuously?
c) if this system can be removed entirely would it be OK to "unplug" the pump as a temporary measure just to prevent running the battery down? Could this be done by removing the appropriate fuse and/or power connector to the pump?
Thanks in advance...
I have a bit of a problem with the secondary air pump not switching off when the ignition is turned off and then running the battery flat. At first I could hear something running and thought it was the fan but having had a look it is definitely the secondary air pump. It has on occasion gone off and on once the ignition is off.
My understanding is that the secondary air system helps heat up the catalytic converter on a cold start, but I have seen elsewhere that some people remove this completely, so I wonder what its value is ultimately?
But this raises a few questions:
a) what could be causing the pump to run on after the ignition is off? Especially what might cause it to go off and on intermittently? (a sensor?)
b) once the catalytic converter is at working temperature shouldn't the pump switch off? Does it run continuously?
c) if this system can be removed entirely would it be OK to "unplug" the pump as a temporary measure just to prevent running the battery down? Could this be done by removing the appropriate fuse and/or power connector to the pump?
Thanks in advance...
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