I NEED SOME INPUT PLEASE ON THIS ONE. BASE Test[SPA 5 GAS CADDY BASE TEST] THE CAR IS A 1993 CADDY DEVILLE 4 L 139412 MILES ON IT. Failed for Nox the reading a in GPM HC.20,CO 3.25 Nox 3.25 limit is 2.50 After testing for codes none found. Ignition scope test ... Login to read more.

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