Hey thanks for the suggestions Jed.
I'll start running down the list of items you note to try to lower the NOx levels. Good to hear that it may be just high combustion temps.
With respect to the over limit HC levels, I had read in another thread that it may be better to fill the tank with 87...
Thanks Jed, I'll take a look at the EGR valve. It doesn't look like that would be too difficult to replace if it is not functioning properly. If you have a chance, take a look at the scan of the report I attached since all the numbers are there.
Hi All,
I've got a great '93 4Runner that I picked up used a year ago. It runs really well and I love driving it. When I purchased it last year it just barely passed the CA emissions test but now a year later it fails and I can't re-register it.
I've cleaned it up as well as I can (new...
