620owner Posted September 13, 2016 Report Share Posted September 13, 2016 I'm noticing the smog pump that the belt has been removed is spinning when the engine is running. What's causing it ? I got a new belt to put on but want to make sure the system is working right before I do.. Quote Link to comment
G-Duax Posted September 13, 2016 Report Share Posted September 13, 2016 Not sure, but probably exhaust pressure turning it backwards ? If so, not good for the pump. Quote Link to comment
racerx Posted September 13, 2016 Report Share Posted September 13, 2016 If you don't need the pump, take it off. Quote Link to comment
datzenmike Posted September 13, 2016 Report Share Posted September 13, 2016 There should be a check valve in line between the pump and the discharge pipes to prevent exhaust back flow. 1 Quote Link to comment
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