All-mighty Smog Guru.....A little help please ?? (2 Viewers)

[In2cruisers]

Well She didnt do so well.. NO is way to high... after doing some inspection, seems Im missing a few things, .. there is a cap on the distributor cap port, the deali-bop that mounts under the air filter cover (passengers side) is missing (empty clip).... maybe more?? I have pulled up a ton of vac. diagrams but they all seem to show the drivers side... not the Passengers side.....a little help please ... Thanks in advance....

And from seeing whats missing... would it contribute to the Bad NO report ??

 

[bhsdriller]

Shown in the below diagram as 23275 VCV

 

[CruiserTrash]

Every time somebody asks, I show them this:

You're probably running slightly lean. Go through the FSM and find the things that that affect the mixture. Check them all. Adjust accordingly. Or, since you only have to do the idle test (not the full driving roller test like we do here in Colorado), just adjust the idle mixture. A little bit of anything goes a long way.

Here's my theory:
These trucks were designed to run lean, they hit the market before measuring NOx spec was a thing. CO and HC were being tested when these cars came out and you can run pretty lean and get good numbers on those, so Toyota's engineers bailed out on the lean side. They didn't know that decades later NOx would come back to bite them in the ass.

 

[Spike Strip]

Your O2 readings are very good and you should be able to pass with just a little tweaking.

The missing valve under the Air Cleaner is NLA, but there is a substitute from the 80 series (at CityRacer LINK )- Same except the position of ports is reversed, so hook up accordingly.

High NOx is from Lean or high combustion temps which are most likely being caused by high Air Injection numbers and lean mix.

Fix the air ventilation on the Distributor, it can really mess up your dissy internals. Dissy is capped because air flow through it is controlled by the missing VCV.

FWIW, the FJ60 is designed to run VERY FAT - evidenced by the 1.47 primary jet which is the largest I've seen in any stock carb'd Land Cruiser application.

Fix those few things, retard the timing to 5* BTDC for the test (Kalif allows +/- 2*), do a lean drop carb adjustment, and I bet you pass.