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Interesting to see the differences in maximums from 93 to 94... Would still fail the CO as a 93, but NOx would pass.

The little scratch in the "dial" is my original marker. In effect, making the spring "tighter" and fully closing the VAF gate when the engine is off. I am not sure what the blue mark is, like I said it looks like someone has been in there before. I did not get any service history when I...

Hmm. I would think it would still lean it out as it would take more air flow to open the gate. Just gut feeling, no mathematical or scientific backing...

I did still have the 88 octane ethanol free fuel in the tank. I think it would have still passed without it though. I am going to leave mine where it is. My NOx is right around where it has been all along. Also, if/when you cut your VAF open, look at the switch when the meter is fully closed...

After seeing this thread this morning, and looking this link from said thread I went out and cut open the cover on the VAF. Marked where it currently was and moved it 2 notches "tighter" or leaner. It still does not go fully closed when the engine is off, but I did not want to go too lean. Drove...

Well, I was feeling hopeful. All for not. Changed the oil to 10w30 Mobile 1, filled up with 88 octane ethanol free gas, put ~70 miles on her and BOMBED latest test. Failing HC now too... HC - 2.9134 (2.5000 max) CO - 97.5629 (25.0000 max) CO2 - 674.9241 NOx - 1.9010 (4.5000 max) Pretty...

Just checked the TVV this morning and it is functioning correctly... Since I left the diag jumper in place I am going to run her down to empty and fill up with some ethanol free fuel and see where that puts me.

It was flashing, I just didn't pay attention. Guess the emissions guy didn't pay attention either...

Yeah, I am questioning the validity and thoroughness of the shop I had check them. I am really trying to NOT think about that since I had to install and then remove the upper intake twice due to bunging up #3 injector o-ring and not checking that it didn't leak BEFORE I put everything back together.

Well... I might have a reason for the crazy jump. Someone left the diagnostic jumper in place. :bang: Still open to feedback though if anyone has ideas (even just a :slap: about the diag jumper).

So, the saga continues... First up, that nipple I had high lighted in post 27 does not go to the EGR. That comes from the EGR VSV in the intake clam-shell. I have no idea what it should go to as it is not in the diagram under the hood. Also, the vacuum hose that had the screw in it from the...

Doh, I knew I unplugged something before I took a pic of everything! :slap:

Yes the PAIR is still hooked up. The hose I highlighted in red in the above pic is not part of the diagram under the hood. :/

Dropped by a dealership to see if they could help find my mystery hose-- no luck. Might end up going back in with a plug in it at this point. Injectors all tested clean, no leaks all between 13.5 and 13.8 Ω. Downside is that the TPS and IACV tested bad. TPS wasn't too bad from Amazon. But...

Dropped the injectors off this morning, and started to try and identify the vacuum hose with the wood screw in it. Looked at the diagram under the hood and it does not show it (best I can tell). Under the VSV there is a section of hard line, with one end connected to a bung on the manifold and...

Well, I found a vacuum hose with this in the end of it... Anyone know the Toyota part number for this? :slap: So I pulled the upper intake as there is no way to figure out what it is supposed to go to otherwise. Figured I'd have the injectors gone over since I'm in there too. Going to drop...

I downloaded a 1993 FSM from the site (this site), but the navigation of it is *ahem* tedious to say the least. I am starting to think it is incomplete too. I'll keep searching through it, but if you know a page or section off hand it would be greatly appreciated.

My gut is telling me the TPS, found the test procedure in the FSM. Going to check it tomorrow and see. Also found the procedure for the EGR and will test that too.

Even though NOx is well below the max?

The EGR valve is a "green top"...