I just bought an 82 toy carbureted and the person who owned it took out all the emissions stuff. I got it tested the other day and failed every category but the idle test ( I'm in tucson AZ) I advance the timing to 6 degrees ( heard that helps but not sure) I'm going to do an efi swap in the coming months so that should make the emissions just fine I imagine but I was wondering if anyone had any sneaky tips to make it pass this one time with the carb just so I can register and legally drive the thing till I do the swap and get a new catalytic converter? Thanks in advance for any help.

 

Not sure about smog laws in AZ but if the timing is incorrect it fails. If it has efi instead of the stock carb it fails. get your sheet of emissions that tells you your nox, o2 and all that which should have been given to you by the smog tech. plug the numbers into a lambda calculator.google it. If your mix is below 1 its rich if its above its lean. find that and adjust. if you have pretty close to lambda your cats bad tap on it and see if the cat rattles. you can get the idle to a low rpm without having the timing advance so that advance will eventually get you in the butt when accelerating and misfire which will make an instant fail. warm up the car by driving it around 30 min before the test at least revving it above 1500 rpm.

 

I got the emission sheet and I only failed by 8 ppm on the hydrocarbons and 2.24% on carbon monoxide. So should I have not done the timing advance? Also all the stock emissions stuff that's supposed to be under the hood is gone I don't know if that makes a fail too or not. It would seem That as long as the actual emissions leaving your vehicle are within standards it should be fine right?

 

Hate to say it and there are many different trains of thought here. A lot of people say advance the timing. I usually pass by retarding it. And that was before I had a cat. Now I bet it passes.
93 22re 214k.

 

so high co is rich. your not burning all your fuel. not having emisions equipment or anything other than stock (carb aproved) in california is an instant fail. It definitley would help to have your emisions stuff haha. whats missing? if its the cat then get one and youll pass egr would help too. get the parts and click the great links on this forum to service manuals to see how they work and hook them up.

 

Ok so today I went and ordered a magnaflo cat and went to the junkyard and grabbed the emissions stuff from a similar year Yota just so it looks to the tech like I have the equipment. Gonna weld the cat on Monday. The timing is at 6 degrees, when it failed the timing was really retarded should I put it back where it was? The test I failed was with headers and no cat.

 

A licensed CAL smog tech will check the timing and might fail you if it is out of spec. So your smog rules must just be whats coming out of the exaust strictly. With a really off timing you might be misfiring even if its not at idle it might misfire at higher rpms giving you hc and co. factory 5 dergrees before tdc with vac advance disconected

 

I'm in AZ and nobody checked my timing. I don't know a darn thing about trucks yet so I don't know what 5 degrees before TDC means? Do you mean I should back it down from 6 degrees to 5 degrees?

 

heres a link to a fsm. it is the same thing as your truck..read it. look how to change your timing. basicly borrow a timing light and turn the distributor to the right timing https://www.yotatech.com/forums/f114...wnload-261385/

 

Thanks that will be helpful. I have a repair manual but it's missing most the pages haha

 

She passed! Now the fun begins haha thanks all for the good advice

 

no problem you have a classic, search the forums and builds here and youl find out that theres a lot of good info here.