Quote:
Originally Posted by BonzoHansen
I thought nox is often egr, so maybe something else in the egr system (relay, etc.)
SES light?
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Quote:
Originally Posted by Pampered-Z
Car stock?
EGR valve could be working but clogged in the manifold. Try using seafoam then replace the plugs. Somewhat common on high milage LT1s.
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Quote:
Originally Posted by Camvill
they only do repairs not inspections
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If they can't measure NOX, then go somewhere that can.