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Q:

egr burst after a tune up on 2004 Mazda Tribute

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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
(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.
If you want to find a Mazda specialist, here's a directory link for you:
https://repairpal.com/directory?address=11691&car_brand_names=Mazda