1993 Astro 240,000 miles - Failed Emission NOx test

[WGO]

Good morning,

I just returned from NJ State vehicle inspection where my 1993 Astro with 239,125 miles on a "Z" engine failed the NOx (Nitrous Oxides) emission test. NJ Standard to Pass: 893 Mine: 1637

After reading other threads in this forum, it looks like I am going to need a new EGR valve... or at least clean the old one.

Can anyone tell me how to locate the ERG valve on my engine? Can I do it from under the hood, or do I need to remove the inside cover?

Any other information would be greatly appreciated.


The Astro also failed because of: STEERING WHEEL LASH.

Any info on this would also be appreciated.

[RABarrett]

Failures for high NOx emissions typically point to EGR problems, either on the control side or the valve itself not opening. Ray