Diagnosing my carb throttle linkage looseness

[Vae Victus]

(fyi @FJ40Jim @ToyotaMatt @65swb45 @fjc-man )

My '76 FJ40 had a non-OEM carb on it, and I've returned it to an OEM-style carb with mechanical linkage (thus, I've never seen a working throttle linkage up close - so this is all a frigging mystery to me).

Here is mine, after refurbishment with all new rubber, fittings, paint, etc. Am I missing something, or is the shaft just so worn that it is loose?

Currently it won't open the secondary on the carb (if I'm saying that right) and is very loose when actuating using the pedal. It moves not in one plane, but in multiple - in other words, it wobbles when it should be stiff and putting the motion into the throttle on the carb.

Vehicle is still being reassembled, so testing with the engine is not an option ATM.

Link to YouTube video showing the motion when pedal is pressed, and when I move it by hand.



Thanks for the help as always!

 

[GA Architect]

(fyi @FJ40Jim @ToyotaMatt @65swb45 @fjc-man )

My '76 FJ40 had a non-OEM carb on it, and I've returned it to an OEM-style carb with mechanical linkage (thus, I've never seen a working throttle linkage up close - so this is all a frigging mystery to me).

Here is mine, after refurbishment with all new rubber, fittings, paint, etc. Am I missing something, or is the shaft just so worn that it is loose?

Currently it won't open the secondary on the carb (if I'm saying that right) and is very loose when actuating using the pedal. It moves not in one plane, but in multiple - in other words, it wobbles when it should be stiff and putting the motion into the throttle on the carb.

Vehicle is still being reassembled, so testing with the engine is not an option ATM.

Link to YouTube video showing the motion when pedal is pressed, and when I move it by hand.



Thanks for the help as always!

View attachment 3210076View attachment 3210077

You are missing the bracket that attaches to the carb's fender side base studs. This is where your torque rod & return spring attaches too...(funny, the below pic from the web shows what you need.)

Maybe this will help mo better....

 

[devo]

This is a job for the Big Skunk….. @ToyotaMatt

 

[Vae Victus]

Thanks @GA Architect. I had seen photos of that bracket, but couldn't find a photo showing it installed. This helps. And yes, IIDHO (if I don't have one), I'll hit up ToyodaMatt. He has all my $$ anyway.

 

[MDH33]

Vacuum secondary on that carb. Is that OEM or a Chinese?

 

[fyton2v]

Pics of stock ‘78 linkage.

 

[ToyotaMatt]

(fyi @FJ40Jim @ToyotaMatt @65swb45 @fjc-man )

My '76 FJ40 had a non-OEM carb on it, and I've returned it to an OEM-style carb with mechanical linkage (thus, I've never seen a working throttle linkage up close - so this is all a frigging mystery to me).

Here is mine, after refurbishment with all new rubber, fittings, paint, etc. Am I missing something, or is the shaft just so worn that it is loose?

Currently it won't open the secondary on the carb (if I'm saying that right) and is very loose when actuating using the pedal. It moves not in one plane, but in multiple - in other words, it wobbles when it should be stiff and putting the motion into the throttle on the carb.

Vehicle is still being reassembled, so testing with the engine is not an option ATM.

Link to YouTube video showing the motion when pedal is pressed, and when I move it by hand.



Thanks for the help as always!

View attachment 3210076View attachment 3210077

You are missing the bracket that attaches to the carb's fender side base studs. This is where your torque rod & return spring attaches too...(funny, the below pic from the web shows what you need.)

Maybe this will help mo better....

View attachment 3210166

This is a job for the Big Skunk….. @ToyotaMatt

Pics of stock ‘78 linkage.

View attachment 3210350

View attachment 3210351

View attachment 3210352

Vacuum secondary on that carb. Is that OEM or a Chinese?

hello mr. vae victus , happy new year ....


i see all your concerns and parts needs issues above clearly , i have everything you need on-hand freshly gold plated too , so no worries there on that topic ...

so forget all that JDM JAZZ for a moment and please take the time to and make the time for what you see below , because i did what i did here for people like you , because that's what i like to do ...

nothing else matters , then you being able to fully grasp the entire big picture skillset-understanding of all things Vintage TOYOTA Land Cruiser accelerator linkage 411 ......

then you can and will apply that new empowerment through education approach that my whole you-tube T-TEN inspired Technical Channel was created to do in a satire dry humor way that is at the same time dead nutz serious too ...


after all , your linkage hangs up and unintended acceleration occurs , lets just NEVER go there is the main point on that

 

[ToyotaMatt]

 

[ToyotaMatt]

 

[Vae Victus]

Once I saw the photo of the bracket I knew I had one.

Now I need longer studs for the carb!
They are just short enough where I cannot even catch a thread on the nut with the bracket installed.

 

[Vae Victus]

Amazing how bad the camera makes the carb look. All that rust isn’t that visible!

 

[Vae Victus]

Vacuum secondary on that carb. Is that OEM or a Chinese?

It’s a TrollHole card - about 8 years old but new. Not a carb expert. Are there concerns?

 

[GA Architect]

It’s a TrollHole card - about 8 years old but new. Not a carb expert. Are there concerns?

You should be good. A few years ago, I bought a TH carb while Jim C rebuilt my OEM unit. I also had it tapped for a return line so my fuel supply/return system wasn't changed. It was a very good replacement. Actually a MUD member has it on his rig right now and said his 40 hasn't run this good for long-long time. If you have any issues, reach out.

 

[Vae Victus]

You should be good. A few years ago, I bought a TH carb while Jim C rebuilt my OEM unit. I also had it tapped for a return line so my fuel supply/return system wasn't changed. It was a very good replacement. Actually a MUD member has it on his rig right now and said his 40 hasn't run this good for long-long time. If you have any issues, reach out.

Thanks man! How are things in HotLanta?

 

[Vae Victus]

Ok, next question - what are the specs of the OEM studs, and can I get longer ones somewhere? Perhaps someone has this info at the tip of their tongue instead of all the esoteric research that one normally has to launch into....

Ok, I asked this same question 5 years ago. I guess I'd better get this truck done so I don't have to start over.

Needed: source for F carb studs

Does anyone know of a substitute for the NLA studs for the F carb on a 70 FJ40? Truck had a Weber on it before so original studs are gone. Haven't yet found a bolt store online with this pretty specific stud. Bottom leg of the stud needs to be 12 mm deep, 8mm x 1.25 thread. Top part needs to...

forum.ih8mud.com

I am looking on BelMetric.com at their studs. I think I can make one of these work.

Metric Studs | BelMetric Fasteners

Explore BelMetric’s selection of metric studs in popular sizes and configurations. Find quality studs built for dependable fastening.

belmetric.com

Related links:
Original studs: Ultimate OEM 4X SERIES PARTS IN STOCK - https://forum.ih8mud.com/threads/ultimate-oem-4x-series-parts-in-stock.249053/post-10442493

 

[GA Architect]

Thanks man! How are things in HotLanta?

Today....it is "Go DAWGS!" day.

Just putting miles on the 40 or just kicking back & taking it slow on the creek these days.

 

[pjohnson]

can I get longer ones somewhere

belmetric.com

 

[Vae Victus]

belmetric.com

Yep.
Ordered these. 56mm is basically OEM length, so ordered 66mm. Not in hand yet.

M8 Double Ended Stud DIN 835, Class 8.8 Steel m8

Bel-Metric sells metric hardware & specialty automotive supplies worldwide. Visit our website to purchase metric fasteners, nuts, bolts, screws, washers & more.

belmetric.com