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egr valve

I have a 305 chevy silverago, 1993....how often should you change the egr valve, or how could you check if it is clogged..it seems to fairly,,I guess,,,moves freely on the diaphragm...thanks

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valve, or how could you check if it is clogged..it seems to fairly,,I guess,,,moves freely on the diaphragm...thanks

If you have a smooth idle and smooth light acceleration from a dead stop, plus no DTC's, it's fine.

Doc

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"Doc"

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