O2's and Air pump...
O2's and Air pump... Does the computer compensate for when the air pump is pumping in air into the exhaust? I'm curious for I noticed that the air pump pumps it's air in before the O2's and I'm wondering if it messes with the O2's.
Thanks!
Ted
Thanks!
Ted
TECH Resident
Joined: Aug 2003
Posts: 970
Likes: 4
From: England UK
Air pumps in air to help heat up the Cats, The Air pump runs for about 30 seconds, your O2 sensors are in open loop until you reach a certain ECT. Therefore the O2's will ignore the air pump.
However, I'm not sure if the air pump comes on if you start the car once already warmed up, as you would be in closed loop by then.
I removed my pump long agin, I know it comes on when cold, not sure about hot starts.
However, I'm not sure if the air pump comes on if you start the car once already warmed up, as you would be in closed loop by then.
I removed my pump long agin, I know it comes on when cold, not sure about hot starts.
Originally Posted by RedWS6 00
Air pumps in air to help heat up the Cats, The Air pump runs for about 30 seconds, your O2 sensors are in open loop until you reach a certain ECT. Therefore the O2's will ignore the air pump.
However, I'm not sure if the air pump comes on if you start the car once already warmed up, as you would be in closed loop by then.
I removed my pump long agin, I know it comes on when cold, not sure about hot starts.
However, I'm not sure if the air pump comes on if you start the car once already warmed up, as you would be in closed loop by then.
I removed my pump long agin, I know it comes on when cold, not sure about hot starts.
TECH Resident
Joined: Aug 2003
Posts: 970
Likes: 4
From: England UK
Certainly only runs on start ups.
By the time I get to my end of the road it would be off by then. So it would have no effect on the sniffer test. Its just to help the cats to become effective quicker, once they are up to temperature the O2's will help with fueling to keep it around 14.6 where th cats work best.
By the time I get to my end of the road it would be off by then. So it would have no effect on the sniffer test. Its just to help the cats to become effective quicker, once they are up to temperature the O2's will help with fueling to keep it around 14.6 where th cats work best.
