81 SR5 overfuelling

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J

Jan-78FJ40

Joined
Sep 6, 2002
Threads
243
Messages
3,587
Hi guys,
My 81 SR5 pickup 4WD with a 22R in California is overfuelling badly with poor gas mileage. It is pretty clear that the carb needs a rebuild. What would you recommend?
Buy a new carb? If so, where?
Have mine rebuilt? If so, where?
Rebuild it myself? If so, what kit end where to get it?

I want to get this done fairly quickly…

Thanks,'
cheers,
Jan
 
The last time I had a carb rebuilt, I didn't even bother with it, I took it to a place that is kinda local to me. I took them a corroded piece of junk stock AISIN carb from my '84, and I was shocked what I got back, it looked brand new. I wish I had taken some photos, it actually looked almost too nice to bolt back on my tired filthy engine. I don't remember what it cost, but IMO it was a bargain.

Hobbs Carburetor Shop in Pelham, NH.

They don't have a website. But they rebuild carbs from all over the world. Several old guys working in a small shop over the owners garage (at his house). Turn around is pretty fast, too.
 
Jan-78FJ40 said:
Hi guys,
My 81 SR5 pickup 4WD with a 22R in California is overfuelling badly with poor gas mileage. It is pretty clear that the carb needs a rebuild. What would you recommend?
Buy a new carb? If so, where?
Have mine rebuilt? If so, where?
Rebuild it myself? If so, what kit end where to get it?

I want to get this done fairly quickly…

Thanks,'
cheers,
Jan
Click to expand...
Jan,
Overfueling, by my research is a term used with diesel engines, so what exactly do you mean for a 22R that's "overfueling"? To convert to gasoline terminology, I'm assuming you mean running rich. And your fuel mileage would suffer if this is the case. This can be adjusted with the mixture screw. But if you have the stock carb, your best bet would be the FSM (Factory Service Manual) for a reference. My '81 came to me used with a Weber on it, so I can't be of much help there. But depending on the mileage, use and age of your truck, a full rebuild may be in order. I'd check with Cdan, he's in the parts dept at American Toyota and also a MUD member on this forum. You get a discount on an order if you mention IH8MUD talking to him on the phone. :cheers:
 
80t0ylc said:
Jan, Overfueling, by my research is a term used with diesel engines, so what exactly do you mean for a 22R that's "overfueling"? To convert to gasoline terminology, I'm assuming you mean running rich. And your fuel mileage would suffer if this is the case. This can be adjusted with the mixture screw. But if you have the stock carb, your best bet would be the FSM (Factory Service Manual) for a reference. My '81 came to me used with a Weber on it, so I can't be of much help there. But depending on the mileage, use and age of your truck, a full rebuild may be in order. I'd check with Cdan, he's in the parts dept at American Toyota and also a MUD member on this forum. You get a discount on an order if you mention IH8MUD talking to him on the phone. :cheers:
Click to expand...

Yes, running rich is the right term. I am definitely stuck in diesel land.
I have the manual and went through the carb adjustment part. The problem is that the carb does not respond to the fuel richness adjustment anymore.
The carb is pretty gunked up and just needs professional help.
Thank you,
Cheers
Jan
 
Jan-78FJ40 said:
Yes, running rich is the right term. I am definitely stuck in diesel land.
I have the manual and went through the carb adjustment part. The problem is that the carb does not respond to the fuel richness adjustment anymore.
The carb is pretty gunked up and just needs professional help.
Thank you,
Cheers
Jan
Click to expand...
Then, yes a rebuild is definitely in order if you want to keep your stock carb. Sounds like you're not here in the States. Depending on where you're located would determine your best $ route as to what to do. Posting your location would help to get local MUD folks to chime in and give you their opinions. Best of luck :cheers:
 
How about you toss the stock turd in the garbage and put a Weber 32/36 on it? Looks better. Runs better. More power. Its got more win than Charlie Sheen on 8ball night.
 
Highluxx said:
How about you toss the stock turd in the garbage and put a Weber 32/36 on it? Looks better. Runs better. More power. Its got more win than Charlie Sheen on 8ball night.
Click to expand...

Ah, nope. It stays stock. Not a fan of Weber's at all.
cheers,
Jan
 
Jan-78FJ40 said:
Ah, nope. It stays stock. Not a fan of Weber's at all.
cheers,
Jan
Click to expand...

We will see if you say that after you rebuild the carb. I rebuilt mine.
It's a terrible finicky almost untunable pile. More choke linkages than a swiss watch.

I guess the 99% of people who switch to webers over stock are wrong.

Habe you owned a Weber? Ever rebuilt the aisin carb?

If you dont plan on rebuilding and just replace it with a factory unit...the price of a non ebay special chinese carb...will be higher than the weber kit.
 
I'm getting ready to rebuild my aisin for the 40 and the pickup. I don't plan on swapping to a weber. Mr. Toyota built them this way on purpose. But your love of webers has been noticed Highluxx. Now, moving on. Let us know how the rebuild goes. Watch pinhead's videos on YouTube. They are worth the hour.
 
I've always been a fan of rebuilding the stock carb, the problem in rebuilding a carb is most folks don't have the time or the know how on the Proper rebuild. One of the commonly overlooked faults on a old high milage carb are the throttle shaft bushings, if they are worn and not replaced good luck on ever achieving a stable idle. When I had my fuel thirsty FJ40's everyone said junk the stock carb for a Webber, while I feel that Webber's, real Italian Webber's, are great on some engines most are ill suited, requiring rejetting at the minimum. Heck I installed a Webber that was to be a direct fit, simple remove and replace, well.....three different size main jets later and it was finally working as should have from the get go. I have no experience with a carbed 22R Toyota engine but do on the Toyota F and 2F engines, the Aisan carbs on those engines worked amazing well, easy to adjust and rebuild as well as good performers.
 
Update: I got a rebuilt Aisin/Toyota carb, swapped it in and the truck runs perfect now.
Cheers,
Thanks for all the help,
Jan
 
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