Intro and Carb Tech Question

[mrsvle]

Good Evening Gentlemen,

It's been several years since I've done much with the Land Cruiser community. My job, wife, and kids seem to get in the way of everything. I was a member of TLCA back in '97 shortly after I purchased my 83 FJ60. It is largly stock with the exception of an Ironman suspension. I have just completed a carb rebuild and have been going through the adjustment section in the FSM. Everything checked out fine until I got to the Unloader (USA) section (p. 6-53). Where it says:

1. Fully open the primary throttle valve and check the choke valve angle. Giving a spec of "Choke vavle angle from horizontal plane: 50 degrees."

2. Adjust by bending the primary throttle arm indicated in the figure. And shows an adjustment being made on the arm of the throttle body assembly.

The problem is when I open the primay throttle valve, the choke valve doesn't move at all, and I can see how bending the throttle arm could possibly actual the choke valve. I didn't even know the choke valve was supposed to open when the primary throttle valve is opened.

I took plenty of digital pictures before I started and everything appears to be reassembled correctly. And I have carefully reviewed the carb images on the Specter web site. Am I misreading something? Is opening the primary throttle valve supposed to close the the choke valve? Did I miss something in the assembly? I would post pics but I haven't been successful in my attempts so far; all my pics are too big. I would appreciate any comments or suggestions. And I'll be glad to post if see anyone with a problem that I've dealt with lately. It's perfect cruisin weather here in Tucson.

Cheers

 

[FJ40Jim]

While holding the choke closed, the choke blade should be forced open by the mechanical linkage on the back of the carb when the throttle is moved wide open. If it is not, then something is assembled incorrectly.

Without pics that's about all I can tell ya.

FWIW, this adjustment is not very important. It only comes into play when the choke is mostly closed and you attempt to drive the vehicle fast.

 

[mrsvle]

Thanks Jim,

When I hold the choke valve closed, then open the throttle, the choke valve is forced to open about a quarter inch. Thanks for the tip.

BTW you rebuild this carb about 6 years ago. Back then my 83 FJ60 was my daily driver so I needed to have the carb rebuilt quickly and correctly. Now it's my weekend driver so I decided to take it on myself.

I am attempting to attach a photo.

My next step will be to remove the cylinder head for a rebuild. I'm hoping this top half rebuild will cure many of the low power issues I've had with my rig.

Cheers

 

[BadgerManBEN]

I am just about to rebuild my carb on my 60 that I bought 3 weeks ago, it sounds like you have a manual of some sort:

"I have just completed a carb rebuild and have been going through the adjustment section in the FSM. Everything checked out fine until I got to the Unloader (USA) section (p. 6-53). "

What is the "FSM" ? I need to find some literature to help me out with this.

 

[FJ40Jim]

FSM= Factory Service Manual
RTFM= Read the Fuctory Manual

I am just about to rebuild my carb on my 60 that I bought 3 weeks ago, it sounds like you have a manual of some sort:
"I have just completed a carb rebuild and have been going through the adjustment section in the FSM. Everything checked out fine until I got to the Unloader (USA) section (p. 6-53)."
What is the "FSM" ? I need to find some literature to help me out with this.

 

[mrsvle]

Toyota 2F Engine Repair Manual (Aug., 1980) Pub. No. 36104E. There is also an Emissions manual that is very useful for making sense of the mass of vacuum lines. Both can be ordered from Specter or probably your local Toyota dealer.

Digital pics during the various stages of disassembly and a set of glass mixing bowls to hold parts were very helpful as well.

You might ask around for recommendations on a carb rebuild kit. I got mine from Specter for around $40. This is the first time I've rebuilt a carb so I can't say whether the kit is any better or worse than others.

Also, you can get a 1 gal can of carb cleaning solvent with a metal basket in it for cleaning the parts from AutoZone. Don't soak rubber parts or the plenum. Do soak overnight since the recommended 30 minutes really isn't enough.

Best of Luck