Pumpkinyota

I have 34's, and my ODO says I get 10 MPG on the dot. Of course, my speedo says that I am doing 42 when I am doing 55. I was so butthurt by this that I went out and did the math...

12-13 is my actual MPG, which still sucks. I haven't tuned in the weber at all though, and I probably need to re-time the thing now.

toyospearo

That makes me feel better about my 14mpg! No offense of course. I heard such great things about the weber and gas milage and power and all that. I don't know I remember better gas milage and power out of my stocker rebuilt carb.
Oh well. Hopefully my buddies issue with his stocker carb is the solenoid. I can't think what else it could be. All those carb lines are accounted for I hope.
Thanks again for your help. I will let you know what's up tomorrow.

Pumpkinyota

Oh yeah, and by the way...

Then this happened:

toyospearo

WOW!
Well it is NOT the fuel cutoff solenoid. It is working clicking. Not sure what to check now. If I punch the throttle it comes back down and dies. It won't hold an idle at 500 or 1500.
Also, the idle mixture screw is doing anything in addition to the idle speed screw. I can't get the idle to come down adjusting either of these screws.
What on earth is going on here??

80t0ylc

You might try this thread:
https://www.yotatech.com/forums/f114...e-help-239336/

I think post # 8 has a procedure for tuning the Weber.

Edit: Oh, damn, sorry - it looks like your buddies carb is OEM. Well maybe there's still some good info in there. Good luck!

Pumpkinyota

OK, next check. Take a look at the sight bowl on the carb. At idle, is it staying full, or running out of fuel?

If it is running out of fuel, start looking at the fuel system. Fuel pump, fuel filter, needle & seat.

Was it running well before you de-smogged it?

How about the distributor vacuum advance and check valve, is there an issue there?

Another thing you might look for is vacuum leaks at any of your capped off locations. Just as a check, you do have everything on the vacuum manifold that is not attached to something capped off, right?

Sorry for the rapid-fire slew of ideas, just wanted to throw up a few things for you to look at. Do you have any more detailed pics of the engine bay in your buddies rig?

toyospearo

Ha! Fixed! Bad wiring. I replaced the green female electric connector and wah la! Idles great no issues! Amazing you can pull all that off the carb and it purrs like a basket of kittens. Thanks again pumkpinyota! You rock

Pumpkinyota

Now I really feel like a D-bag. I was going to recommend replacing that connector with 4 spade disconnect pairs, but I was waiting to see if that was the issue first. I screwed around with trying to re-use the stock toyota harness plugs for 10 years before I flipped the hell out, grabbed my klein high-leverage cable cutters, cut that @#$% wiring harness out of my truck, and tossed in a 20 circuit painless waterproof harness from scratch. Painful two week install, but one of the most ultimately rewarding things I have ever done to a vehicle.

ROFL @ basket of kittens! Adding that to my sig.

Pumpkinyota

Holy crap, I just looked at how many views this thread has: 18,170 to date. It is also the #1, #2 and #3 result when you google "de-smog 22r".

Thanks for the views guys, hopefully this has been helpful to date. I will try to review my notes, and toss up a few more details on this process to finish off what I set out to in the beginning. Please feel free to post if you need help. If I don't respond right away, feel free to PM me. I am not as active on Yotatech as I used to be due to a busy work schedule, but I will still try to help when I can.

Also, if this thread is helpful, I would love for you to rate it! Thanks again!

Kaledrah

I have recently de-smoged my '84 and it has improved almost everything. Next steps for me: Carb Kit and Wiring Harness.

peow130

Bumping to get this amazing thread stickied.

Lons81

iTrader: (2)

Wanted to say thanks for all the info here. Just completed my de-smog on my 81 SR5, waiting for the block plates to arrive. Sure cleans up the engine bay nicely. I kinda went at it backwards from the posts, took all the vacuum stuff off made it easier to get the smog stuff off. But that's just me.

scheefdog

This is an awesome thread! I'm working backwards with my truck and could use some help....

My truck was desmogged by the previous owner who installed a solex 34/34 carb. I'm not happy with that carb and found a stock 22r carb that I am in the process of rebuilding that I am going to try on the truck.

So my question is; What and where do I need to run vacuum lines to and from on the stock carb? Maybe someone who has their truck totally desmogged could show me what they still have hooked up? Pics would be awesome!

Weigle

I bought a truck that was entirely de-smogged. It looks like they did everything in your tutorial correctly and THEN some. I did notice that your PCV valve location is now a vent, and your valve cover breather is wide open. How is that working for you? I recently disconnected the valve breather from my weber 32/36 and 22R and put a small breather in its place; however, the PCV is still connected.

Also, is there any consequence to unplugging the ECU (Emission Control computer) from under the driver-side kick panel? Seems like a useless piece of junk now. Will it cause the electronics confusion and create problems?

Thanks again! Amazing tutorial!

Lons81

iTrader: (2)

Although I haven't hooked up any vacuum lines as of yet since pulling all that crap out, you can go back to page 3, post 57 & 59 to get an idea of what you need. There are some options in the posts, depending on the items you have left. The diagrams shows some hookups, I think I'm going to start with using the "Canadian" vacuum hookup. If you get yours running good, let us know what you have hooked up, as my truck will be under resto until around summer.

Schnayke

iTrader: (1)

I have this build up on a 2wd 83 pickup 22r, and I get between 25, and 36 miles per gallon. I think maybe that guy had a 2wd pickup rather then a 4wd, the later get terrible gas milage in comparison, I had a buddy with a 4wd, a few yars back and he was lucky to get 15, same engine same year, same setup, just 4wd, vs 2wd.

Soul_keeper

I wish california would let me do this ...
They wouldn't even smog it with my weber on when I tried a few years back. The weber has just been sitting in a box since
btw i've also managed 30mpg a few times on my 89 2wd pickup with standard tires and slow driving.

Pumpkinyota

Hopefully, someone has already answered you elsewhere, if not, my apologies on the delay. This post should v=give you all the needed info:

https://www.yotatech.com/forums/f114...l#post51388265

Good luck!

Pumpkinyota

Ah good, someone did get it, my thanks ;-)

Pumpkinyota

My PCV valve is still in place under that filter. It does have a valve cover breather as well, the above pic was from during the build =).

The only consequence that springs to mind of unplugging that ECU is that you will need to change the wiring to the fuel shutoff solenoid. Currently, that is run through the ECU, but you can just put in an ignition-switched hot lead to clear that up.

Other than that... what electronics? If you have desmogged, there aren't really any more electronics to worry about...

Good luck!