need some carb help

[Crusted]

I had a friends carb on my 60 and have been needing to put mine back on for a while. I finally got around to it and I am having a tough time with this. It ran like crap and wouldn't idle. I took it off and did a complete rebuild, soaking it, checking all passages etc. I looked into the carb while it was running and it appears that there is fuel leaking out where the power pump spits it's fuel out. There is actually fuel sitting on top where you screw in the venturi. I know the steel balls are in place for both the pump and the discharge weight... Why is it leaking? Everything else seems okay.... fuel level in bowl etc.

Any tips?
Greg
84 FJ60

 

[dogboy2]

Unfortunately I can't offer any DIY advice on how to solve your immediate problem but can recommend the services of Jim Chenoweth of TLC Performance for an amazing carb rebuild.

For what it's worth, you end up with a rebuilt carb that in my experience, out performs the original factory build with better economy to boot. He's got some tricks up his sleeve and knows how to tweak the Aisin carbs to suit your particular needs. In the time it will take you to troubleshoot yours and get it dialed in, I bet Jim could probably build yours and get it back to you.

HTH,
-dogboy- '87 FJ60

 

[beaufort-fj60]

did you put the rubber donuts on the venturis?

 

[Crusted]

did you put the rubber donuts on the venturis?

yep... Installed and verified.

Looking at the carb schematics, it appears that the BB in the discharge is what keeps fuels from leaking out during normal operation. I wonder if the kit had the wrong size. But I guess as long as it's bigger than the port then it works. The spring looks good as well.

-GP

 

[beaufort-fj60]

is the horn tight?

 

[Crusted]

is the horn tight?

checked and rechecked. Gasket shows no sign of saturation that I can determine.

 

[FJ40Jim]

There is not enough airflow through the primary to pull fuel over the AP circuit, even if the check balls were left out.

Usually fuel dribble is a result of float level adjusted way too high.

What is the current symptom? won't idle? won't transition? Won't run under load?

 

[Crusted]

There is not enough airflow through the primary to pull fuel over the AP circuit, even if the check balls were left out.

Usually fuel dribble is a result of float level adjusted way too high.

What is the current symptom? won't idle? won't transition? Won't run under load?

Symptoms: Wont idle at all, only way to keep running is to keep the engine at about 1500+ RPM's - and even that's a rough run.

some times I can get it to idlea round 1000-1100 rpm but I guess that really isnt an idle but more of a criuse control...

I was just going over everything again and noticed that the top-most port of the primary venturi was clogged. I put it back in the nuke-bath and cleaned it again. I'm setting the float a little low as well to see how that affects the acc. pump issue. I'll report back in a little while.

Is there some sort of trick to adjusting the float? Hitting the 6mm mark is easy enough but setting the other side to 1.1mm is a stretch. I can't seem to get it right.

I appreciate all the help

 

[Crusted]

There is not enough airflow through the primary to pull fuel over the AP circuit, even if the check balls were left out.

Usually fuel dribble is a result of float level adjusted way too high.

What is the current symptom? won't idle? won't transition? Won't run under load?

update:
The leaking gas is fixed. Must have been the float too high but it sure didnt look like it. I can get to idle after it has warmed up but not less than 1000 rpm. And at that it's a rough idle. Idle mix screw does affect idle which is a first.

What should I look at next?

Thx

 

[FJ40Jim]

The ICS is not operating correctly.
Check for power & ground, troubleshoot as needed.