egr burst after a tune up on 2004 Mazda Tribute

i went to mechanic be cause egr had burst i replaced it i then had a tune up the same day he drove the car and it burst after he tested the car

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1 answer
It's probably that the EGR vacuum regulator is failing, causing the EGR to stay on too much, burning a hole in it. Get the EGR regulator checked out.
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