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David

David 3/21/2011

1995 Nissan Altima GXE 4 Cyl 2.4L

Preventive Maintenance

failing smog test @ 25 mph in category NO (PPM),the MAX is 511 im measured 613,what could be the cause??

1 Answer


HouseCallAuto

HouseCallAuto 3/21/2011


1. Check the EGR valve for proper operation; when opening at idle the engine should stall.

2. Verify that the engine is at the correct operating temperature.

3. Update me.

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