Quote:
Originally Posted by blownmotor
muffler would not help with emissions sounds to me you have a egr problem since you failed the 15mph test you have to perform a functionality test on the egr
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/\/\/\/\ agreed. a new cat might be enough of a band aid to get u thru the test, but a strong possibility is that either your egr valve diaphragm is torn or otherwise leaking, or that the egr tubing/passageways are clogged.