Quote:
Originally posted by zeronero
What I meant was, when I bring the car into get tested the engine will already be hot so the pump won't be used.
I was just looking at an M119 drive belt diagram and if I do remove it I will need a get a idler pulley in its place. So depending on the cost of that part I might just get a replacement pump. So far I've found one at $225.
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Smog tests require that the tester confirm that all parts are in working order. He can fail you on just the visual inspection.
You cannot pass smog with a tripped check engine light, either. Without the air pump hooked up, it will be tripped. Further, even if you clear the code(s) related to the check engine light, the DM still stores other codes.
Last, the air pump runs whenever the ECM decides it is necessary, which is also sometimes at idle, even when warm.