The issue with older engine designs like this is that the HC levels creep up over time and there's nothing that you can do about it short of a rebuild. Other than the EGR not activating at under 2000 rpm in 1st or 2nd due to the cat-back and headers (I never drive it at less than 2500rpm if I can help it anyways), the rest of the truck passed quite easily.
Other than the fact that the HC has been creeping up over time towards the limit here(which seems to be going *down*)
Yep - check this out - from my actual tests:
Los Angeles CARB Limits 2008 1987 4Runner:
HC 131/101
CO 0.87/1.10
NO 1085/1120
Los Angeles CARB Limits 2010 1987 4Runner:
HC 131/101
CO 0.61/0.77 (29.9% less/30% less)
NO 1085/1120
So, yes, they are messing with us behind the scenes in order to get us off the roads. In the past the limits stayed the same or went up slightly to compensate with age. Now they are dropping them. They expect my truck to pollute 30% LESS in two years time?
Also, I found out that the governmnent doesn't have actual data in their computers for original limits/specs for pollution farther back than 1988.(and no 0 mile say, 1980 cars to test) So they're basically making up numbers for vehicles from 1976-1987. Ie - it's impossible pretty much for a 22R with carbs to pass in Los Angeles any more without a new engine/swap.
