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- - Electric Smog Pump (https://www.saturnforum.com/forum/saturn-s-series-sedan-27/electric-smog-pump-12007/)

BStraus

Mar 29, 2020 03:24 PM

Electric Smog Pump

Does this pump run continuously? Or just when you start the car? I disconnected the hose from the pump, started the car, and it was blowing air but then stopped again. Any guidance would be appreciated. This is a 99 SL2 by the way,

02 LW300

Mar 29, 2020 05:03 PM

The computer controls it to aid in oxygen sensor and cat warmup so the car can get into closed loop sooner.

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